Update version to 9.5.2
This is required by GitLab CE in https://gitlab.com/gitlab-org/gitlab-ce/commit/9647913acbdb4f65ec0d943bcbc72311dac992ec
Not having this set causes GDK to update gitlab-shell each spec run.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This is required by GitLab CE in https://gitlab.com/gitlab-org/gitlab-ce/commit/9647913acbdb4f65ec0d943bcbc72311dac992ec
Not having this set causes GDK to update gitlab-shell each spec run.