[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/538/ : UNSTABLE in 1h 42m 03s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/538/ : UNSTABLE in 3h 11m 59s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-14/256/ : UNSTABLE in 3h 51m 50s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/540/ : SUCCESS in 3h 44m 31s