packaging: ovirt-release-11.1.0

- Splitted nightly builds in separate ovirt-nightly.repo file.
- Added ovirt-3.4-stable and ovirt-3.3-stable repositories.
- Dropped beta and updates testing in favor of ovirt-3.3-prerelease.

Change-Id: I9484b43935730050723b7fde74873edd36847739
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>