Revert "update pattern to [a-zA-Z0-9_]"

This reverts commit 3e07c4a.

Author: forteddyt

specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2021-03-01-preview/mfe.json

@@ -3178,7 +3178,7 @@
       "properties": {
         "path": {
           "description": "The path of file/directory.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string"
         },
         "isDirectory": {
@@ -3422,7 +3422,7 @@
         },
         "thumbprint": {
           "description": "Thumbprint of the certificate used for authentication.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string"
         }
       },
@@ -3488,7 +3488,7 @@
       "properties": {
         "userId": {
           "description": "SQL database user name.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string"
         },
         "password": {
@@ -3585,7 +3585,7 @@
         },
         "storeName": {
           "description": "Azure Data Lake store name.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string"
         }
       },
@@ -3611,7 +3611,7 @@
         },
         "databaseName": {
           "description": "Azure SQL database name.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "x-ms-mutability": [
             "create",
@@ -3620,7 +3620,7 @@
         },
         "endpoint": {
           "description": "Azure cloud endpoint for the database.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "example": "database.windows.net",
           "x-ms-mutability": [
@@ -3639,7 +3639,7 @@
         },
         "serverName": {
           "description": "Azure SQL server name.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "x-ms-mutability": [
             "create",
@@ -3677,7 +3677,7 @@
         },
         "databaseName": {
           "description": "Azure SQL database name.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "x-ms-mutability": [
             "create",
@@ -3686,7 +3686,7 @@
         },
         "endpoint": {
           "description": "Azure cloud endpoint for the database.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "example": "database.windows.net",
           "x-ms-mutability": [
@@ -3705,7 +3705,7 @@
         },
         "serverName": {
           "description": "Azure SQL server name.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "x-ms-mutability": [
             "create",
@@ -3735,7 +3735,7 @@
         },
         "databaseName": {
           "description": "Azure SQL database name.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "x-ms-mutability": [
             "create",
@@ -3744,7 +3744,7 @@
         },
         "endpoint": {
           "description": "Azure cloud endpoint for the database.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "example": "database.windows.net",
           "x-ms-mutability": [
@@ -3763,7 +3763,7 @@
         },
         "serverName": {
           "description": "Azure SQL server name.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "x-ms-mutability": [
             "create",
@@ -3785,7 +3785,7 @@
       "properties": {
         "accountName": {
           "description": "Storage account name.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "x-ms-mutability": [
             "create",
@@ -3803,7 +3803,7 @@
         },
         "containerName": {
           "description": "Storage account container name.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "x-ms-mutability": [
             "create",
@@ -3820,7 +3820,7 @@
         },
         "endpoint": {
           "description": "Azure cloud endpoint for the storage account.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "example": "core.windows.net",
           "x-ms-mutability": [
@@ -3830,7 +3830,7 @@
         },
         "protocol": {
           "description": "Protocol used to communicate with the storage account.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "example": "https",
           "x-ms-mutability": [
@@ -3850,7 +3850,7 @@
       "properties": {
         "serverAddress": {
           "description": "GlusterFS server address (can be the IP address or server name).",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "x-ms-mutability": [
             "create",
@@ -3859,7 +3859,7 @@
         },
         "volumeName": {
           "description": "GlusterFS volume name.",
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "x-ms-mutability": [
             "create",
@@ -4481,7 +4481,7 @@
         "command": {
           "description": "The command to execute on startup of the job. eg. [\"python\", \"train.py\"]",
           "minLength": 1,
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string",
           "x-ms-mutability": [
             "create",
@@ -5033,7 +5033,7 @@
       "type": "object",
       "properties": {
         "primaryMetricName": {
-          "pattern": "[a-zA-Z0-9_]",
+          "pattern": "\\w",
           "type": "string"
         },
         "primaryMetricGoal": {