Apex: Create promotion and verify job for Apex CSIT snapshots

Apex: Create promotion and verify job for Apex CSIT snapshots

Changes Include:
 - Adds a daily job to create Apex snapshot tarball if functest passes
 - snapshot artifact uploaded to artifacts.opnfv.org
 - snapshot artifcat info is stored in snapshot.properties
 - 3rd party job updated to deploy from snapshot
 - 3rd party install netvirt job updated to use updated sdnvpn tools

JIRA: APEX-364

Depends-On: I792db0fac3f4e81969fe85c05fc298fe5af02537

Change-Id: I8a875c081d756d098173c0baf11c0b4e4956b9fd
Signed-off-by: Tim Rozet <trozet@redhat.com>
Signed-off-by: Nikolas Hermanns <nikolas.hermanns@ericsson.com>
Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>