Fix boolean defaults. (#1343)

plugins/modules/cloud/google/gc_storage.py

@@ -86,6 +86,7 @@ options:
     description:
       - Whether versioning is enabled or disabled (note that once versioning is enabled, it can only be suspended)
     type: bool
+    default: false
 
 requirements:
     - "python >= 2.6"

plugins/modules/cloud/google/gce.py

@@ -148,7 +148,6 @@ options:
       - if set to C(yes), instances will be preemptible and time-limited.
         (requires libcloud >= 0.20.0)
     type: bool
-    default: 'no'
   disk_size:
     type: int
     description:

plugins/modules/cloud/google/gce_pd.py

@@ -21,7 +21,6 @@ options:
     description:
       - do not destroy the disk, merely detach it from an instance
     type: bool
-    default: 'no'
   instance_name:
     type: str
     description:
@@ -87,7 +86,6 @@ options:
     description:
       - If C(yes), deletes the volume when instance is terminated
     type: bool
-    default: 'no'
   image_family:
     type: str
     description: