Merge branch 'stable-3.0' into stable-3.1

* stable-3.0:
  Update git submodules
  Update git submodules
  Schema_146: Disable bitmap index re-build during full gc
  Schema_154: Disable bitmap index re-build during full gc
  Schema_154: Periodically run full gc
  Schema_146: Periodically run full gc
  Revert "Keep alive database connection to prevent exceeding wait timeout"

Change-Id: I9d4664f8743cd390a686e5c93b35ca169336c7db