[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/297/ : SUCCESS in 1h 45m 02s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/290/ : SUCCESS in 3h 47m 47s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/290/ : UNSTABLE in 3h 44m 47s