Cache the User's Project by Token ID

Project list fetched for each request. The patches caches the
project list and uses the token as the key in the cache. When
the user logout or switch project, the project list is removed
from the cache.

Change-Id: I2386d7a342cf02a0252e97cc48c5349ccab8a9eb
Closes-bug: 1241838
Merge "Cache the User's Project by Token ID"