[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/280/ : SUCCESS in 1h 40m 06s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/273/ : UNSTABLE in 2h 58m 52s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/273/ : SUCCESS in 4h 41m 33s