[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/188/ : SUCCESS in 1h 39m 50s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/181/ : SUCCESS in 3h 28m 03s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/180/ : UNSTABLE in 2h 58m 46s