Rename git hooks to push rules
Fixes https://gitlab.com/gitlab-org/gitlab-ee/issues/189
I also created an issue for removing deprecated API https://gitlab.com/gitlab-org/gitlab-ee/issues/755
Fixes https://gitlab.com/gitlab-org/gitlab-ee/issues/189
I also created an issue for removing deprecated API https://gitlab.com/gitlab-org/gitlab-ee/issues/755