tree fb52c7ca3021d743a55424df3ea9a9a9b58641a4
parent fc0f43b4453978e3f2790f4fcb4c6169b94534df
author Luca Milanesio <luca.milanesio@gmail.com> 1481326675 +0000
committer Luca Milanesio <luca.milanesio@gmail.com> 1481409977 +0000

Use persistent cache for GitHub groups

Retrieval of GitHub groups is a very expensive operation
and causes the start-up of Gerrit to be very sloppy.

By using a persistent cache we should avoid to rescan all
the GitHub groups when rescanning the users and changes.

Change-Id: Ib1c67f17d45ca63c54f5c801859cced42b756b54