[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/137/ : SUCCESS in 1h 37m 23s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/129/ : SUCCESS in 2h 49m 40s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/129/ : UNSTABLE in 4h 17m 04s