Allow plugins to reuse classes for caching resources

Plugins may want to implement a cache with own resources. For this it
is useful to reuse the resource classes from Gerrit instead of
reimplementing them in the plugin.

Change-Id: I7d42004aa7c9311bf12245d4348c27954ce6118e
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
7 files changed