Hey Piotr and Oved,
Can you have a look at:
http://jenkins.ovirt.org/job/vdsm-jsonrpc-java_master_build-artifacts-fc23-x86_64/3/console
http://jenkins.ovirt.org/job/vdsm-jsonrpc-java_3.6_build-artifacts-fc23-x86_64/1/console

>> 07:02:35 Tests run: 3, Failures: 0, Errors: 3, Skipped: 0, Time elapsed: 560.634 sec <<< FAILURE! - in org.ovirt.vdsm.jsonrpc.client.reactors.stomp.SSLStompClientTestCase
>> 07:02:35 testLongMessage(org.ovirt.vdsm.jsonrpc.client.reactors.stomp.SSLStompClientTestCase) Time elapsed: 180.56 sec <<< ERROR!
>> 07:02:35 org.ovirt.vdsm.jsonrpc.client.ClientConnectionException: Connection timeout

to ensure this isn't related to the Jenkins migration I re-triggered it on the old instance with the same results(http://jenkins-old.ovirt.org/job/vdsm-jsonrpc-java_master_build-artifacts-fc23-x86_64/14/)

Thanks,

Nadav.