Fix owners plugin build after standalone refactoring

Since the refactoring of the owners as standalone build as well,
the owners-common package is not located anymore under /plugins
but is found on the root Gerrit src directory.

Gerrit CI builds have been failing since then and are now fixed.

Change-Id: I78388a1c368d73b5eb07e693c31e2214ee1d0096
2 files changed
tree: 9d625edc340ab4cd7c3ca7e6aa05f665ff48edbe
  1. jenkins/
  2. jenkins-docker/
  3. .gitignore