ZANATA-84: Upgrade liquibase version to 3.0.7
rhbz1036435 - Add comment with a liquibase upgrade notice.
Merge pull request #3 from zanata/parent-liquibase-3.x

rhbz1036435: Upgrade liquibase version to 3.0.7
Merge commit '1e5e226a41d80df06727445531d997a0b3a7567a' into integration/master