Fixed the nagging 404 errors in the unit test.

Make the nagging 404 errors in VolumeViewTests go away.

Closes-Bug: #1367383

Change-Id: Ib3e182b6b30bcb75a82235c845af6e72801fdb21
Stop using intersphinx

Remove intersphinx from the docs build as it triggers network calls that
occasionally fail, and we don't really use intersphinx (links other
sphinx documents out on the internet)

This also removes the requirement for internet access during docs build.

This causes docs jobs to fail because we error out on warnings.

Change-Id: I71e941e2a639641a662a163c682eb86d51de42fb
Related-Bug: #1368910
Merge "Fixed the nagging 404 errors in the unit test."
Merge "Stop using intersphinx"