This is the second part of migrating project watches from database to
git.
This change:
* bumps the database schema version
* migrates the project watches from database to git (for single
instance Gerrit servers)
* deletes the database table
* deletes the user.readProjectWatchesFromGit config option
Change-Id: I9dc99f5483fdd72cf6e237236ed0b23f14b60249
Signed-off-by: Edwin Kempin <ekempin@google.com>
b043d448a7