Fix gce module to compile on python 3 (#3179)

lib/ansible/modules/extras/cloud/google/gce_img.py

@@ -166,7 +166,8 @@ def create_image(gce, name, module):
     return True
   except ResourceExistsError:
     return False
-  except GoogleBaseError, e:
+  except GoogleBaseError:
+    e = get_exception()
     module.fail_json(msg=str(e), changed=False)
   finally:
     gce.connection.timeout = old_timeout

lib/ansible/modules/extras/cloud/google/gce_tag.py

@@ -156,7 +156,8 @@ def remove_tags(gce, module, instance_name, tags):
         node = gce.ex_get_node(instance_name, zone=zone)
     except ResourceNotFoundError:
         module.fail_json(msg='Instance %s not found in zone %s' % (instance_name, zone), changed=False)
-    except GoogleBaseError, e:
+    except GoogleBaseError:
+        e = get_exception()
         module.fail_json(msg=str(e), changed=False)
 
     node_tags = node.extra['tags']