Fix tests - but couldnt test locally

Author: kertal

test/functional/apps/discover/_doc_table_newline.ts

@@ -22,7 +22,7 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
       await security.testUser.setRoles(['kibana_admin', 'kibana_message_with_newline']);
       await esArchiver.loadIfNeeded('test/functional/fixtures/es_archiver/message_with_newline');
       await kibanaServer.uiSettings.replace({
-        defaultIndex: 'message_with_newline',
+        defaultIndex: 'newline-test',
         'doc_table:legacy': true,
       });
       await PageObjects.common.navigateToApp('discover');

test/functional/fixtures/es_archiver/message_with_newline/mappings.json

@@ -1,27 +1,7 @@
 {
   "type": "index",
   "value": {
-    "index": "without-timefield",
-    "settings": {
-      "index": {
-        "number_of_replicas": "0",
-        "number_of_shards": "1"
-      }
-    }
-  }
-}
-
-{
-  "type": "index",
-  "value": {
-    "index": "with-timefield",
-    "mappings": {
-      "properties": {
-        "@timestamp": {
-          "type": "date"
-        }
-      }
-    },
+    "index": "newline-test",
     "settings": {
       "index": {
         "number_of_replicas": "0",