Enable concurrency for oscore deploy jobs

Enable concurrency for test-salt-formula-refspec-template parent
job.

Apply throttle category for test-openstack-component-formula jobs.

Our CI is bottleneck for salt-formula changes at the moment,
since we do not allow concurrent builds.
This patch allows to configure job concurrency with
Throttle Concurrent Builds plugin.

Depends-On: Ie5ec841af6a1d73959e760471d7ed00ac7c3f882

Change-Id: Id1e141220e1d87bf69e5cdd12a18fe437450e1ae
1 file changed