[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/536/ : UNSTABLE in 1h 42m 28s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/536/ : UNSTABLE in 3h 28m 29s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-14/254/ : UNSTABLE in 3h 41m 36s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/538/ : UNSTABLE in 4h 56m 28s