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/ec2_vpc_igw_info.py

@@ -94,8 +94,6 @@
     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 get_aws_connection_info
-from ansible_collections.amazon.aws.plugins.module_utils.ec2 import boto3_conn
 from ansible_collections.amazon.aws.plugins.module_utils.ec2 import camel_dict_to_snake_dict
 from ansible_collections.amazon.aws.plugins.module_utils.ec2 import ansible_dict_to_boto3_filter_list
 
@@ -136,10 +134,9 @@ def main():
 
     # Validate Requirements
     try:
-        region, ec2_url, aws_connect_kwargs = get_aws_connection_info(module, boto3=True)
-        connection = boto3_conn(module, conn_type='client', resource='ec2', region=region, endpoint=ec2_url, **aws_connect_kwargs)
-    except botocore.exceptions.NoCredentialsError as e:
-        module.fail_json(msg="Can't authorize connection - " + str(e))
+        connection = module.client('ec2')
+    except (botocore.exceptions.ClientError, botocore.exceptions.BotoCoreError) as e:
+        module.fail_json_aws(e, msg='Failed to connect to AWS')
 
     # call your function here
     results = list_internet_gateways(connection, module)