[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/508/ : UNSTABLE in 1h 33m 14s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/507/ : UNSTABLE in 3h 00m 05s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-14/224/ : UNSTABLE in 3h 23m 43s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/510/ : UNSTABLE in 3h 46m 00s