The fence-agent `fence_gce` and resource-agents `gcp-vpc-move-route` and `gcp-vpc-move-vip` can fail with if token file is not found

Issue

• The fence-agent fence_gce and resource-agents gcp-vpc-move-route and gcp-vpc-move-vip can fail with if token file is not found
• The fence-agent fence_gce fails with the following error when attempting to fence a cluster node:

# fence_gce --action=reboot --zone=us-west1-c --project=sap-wizard -n node43 -v
2019-02-27 14:09:51,013 WARNING: file_cache is unavailable when using oauth2client >= 4.0.0
Traceback (most recent call last):
  File "/usr/lib/fence-agents/bundled/gce/googleapiclient/discovery_cache/__init__.py", line 41, in autodetect
    from . import file_cache
  File "/usr/lib/fence-agents/bundled/gce/googleapiclient/discovery_cache/file_cache.py", line 41, in <module>
    'file_cache is unavailable when using oauth2client >= 4.0.0')
ImportError: file_cache is unavailable when using oauth2client >= 4.0.0
2019-02-27 14:09:51,014 INFO: URL being requested: GET https://www.googleapis.com/discovery/v1/apis/compute/v1/rest
2019-02-27 14:09:51,149 INFO: URL being requested: GET https://www.googleapis.com/compute/v1/projects/sap-wizard /zones/us-west1-c/instances/node43?alt=json
2019-02-27 14:09:51,150 INFO: Attempting refresh to obtain initial access_token
2019-02-27 14:09:51,198 WARNING: Encountered 403 Forbidden with reason "insufficientPermissions"
2019-02-27 14:09:51,198 ERROR: Failed: get_power_status: <HttpError 403 when requesting https://www.googleapis.com/compute/v1/projects/sap-wizard/zones/us-west1-c/instances/node43?alt=json returned "Insufficient Permission: Request had insufficient authentication scopes.">

In the logs the following message is logged when using fence_gce.

Feb 28 11:59:40 node42 fence_gce: Failed: Create GCE compute v1 connection: load_pem_private_key() takes exactly 3 arguments (2 given)