ovirt-node-plugin-vdsm.spec: increase the release

New build to include:
- engine_page: ovirt.node.config.defaults SSH (BZ#901497)

Change-Id: Idae89d9203e7ec0861143cbeee3a6f5766baf1e1
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>