Update bare exceptions to specify Exception.

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

lib/ansible/module_utils/azure_rm_common.py

@@ -1069,7 +1069,7 @@ class AzureRMAuth(object):
         for key in AZURE_CREDENTIAL_ENV_MAPPING:
             try:
                 credentials[key] = config.get(profile, key, raw=True)
-            except:
+            except Exception:
                 pass
 
         if credentials.get('subscription_id'):