Disable Gitweb for in-memory acceptance tests

When running any in-memory acceptance tests, if Gitweb is installed,
the tests were failing because the GitWebSerlvet initialization requires
gerrit.basePath.

Change-Id: Ia3286176c671f92366425f628a09a19caf90e23f
Fix ordering of 2.9.x releases in the release notes index.

Change-Id: Ifd835e4a344710d635caaedc323977d6fbfca8fd