Update bare exceptions to specify Exception.

This will keep us from accidentally catching program-exiting exceptions
like KeyboardInterupt and SystemExit.

test/units/module_utils/ec2/test_aws.py

@@ -20,7 +20,7 @@ try:
     import boto3
     import botocore
     HAS_BOTO3 = True
-except:
+except Exception:
     HAS_BOTO3 = False
 
 import pytest