Cleanup: Bulk Migration from boto3_conn to module.client() (ansible-c…

…ollections#188)

* Migrate from boto3_conn to module.client
* Simplify error handling when creating connections
* Simplify Region handling
* Remove unused imports
* Changelog

This commit was initially merged in https://github.com/ansible-collections/community.aws
See: ansible-collections/community.aws@6bdf00d

plugins/modules/iam_server_certificate_info.py

@@ -81,13 +81,12 @@
 
 try:
     import boto3
+    import botocore
     import botocore.exceptions
 except ImportError:
     pass  # Handled by AnsibleAWSModule
 
 from ansible_collections.amazon.aws.plugins.module_utils.core import AnsibleAWSModule
-from ansible_collections.amazon.aws.plugins.module_utils.ec2 import boto3_conn
-from ansible_collections.amazon.aws.plugins.module_utils.ec2 import get_aws_connection_info
 
 
 def get_server_certs(iam, name=None):
@@ -151,10 +150,9 @@ def main():
                          date='2021-12-01', collection_name='community.aws')
 
     try:
-        region, ec2_url, aws_connect_kwargs = get_aws_connection_info(module, boto3=True)
-        iam = boto3_conn(module, conn_type='client', resource='iam', region=region, endpoint=ec2_url, **aws_connect_kwargs)
-    except botocore.exceptions.ClientError as e:
-        module.fail_json(msg="Boto3 Client Error - " + str(e.msg))
+        iam = module.client('iam')
+    except (botocore.exceptions.ClientError, botocore.exceptions.BotoCoreError) as e:
+        module.fail_json_aws(e, msg='Failed to connect to AWS')
 
     cert_name = module.params.get('name')
     results = get_server_certs(iam, cert_name)