[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/155/ : SUCCESS in 1h 41m 37s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/148/ : SUCCESS in 2h 49m 15s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/147/ : UNSTABLE in 4h 23m 09s