ec2_ami_copy.py: Fix WaiterError handling. (#27416)

* ec2_ami_copy.py: Fix WaiterError handling.

Change suggested by Adam Johnson at https://github.com/ansible/ansible/issues/26971

* ec2_ami_copy.py: WaiterError: fail_json: add exception parameter.

* ec2_ami_copy.py: import traceback

lib/ansible/modules/cloud/amazon/ec2_ami_copy.py

@@ -133,6 +133,8 @@ EXAMPLES = '''
 from ansible.module_utils.basic import AnsibleModule
 from ansible.module_utils.ec2 import (boto3_conn, ec2_argument_spec, get_aws_connection_info)
 
+import traceback
+
 try:
     import boto
     import boto.ec2
@@ -180,7 +182,7 @@ def copy_image(module, ec2):
 
         module.exit_json(changed=True, image_id=image_id)
     except WaiterError as we:
-        module.fail_json(msg='An error occurred waiting for the image to become available. (%s)' %  we.reason)
+        module.fail_json(msg='An error occurred waiting for the image to become available. (%s)' % str(we), exception=traceback.format_exc())
     except ClientError as ce:
         module.fail_json(msg=ce.message)
     except NoCredentialsError: