[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/185/ : SUCCESS in 1h 44m 18s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/178/ : UNSTABLE in 4h 19m 47s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/177/ : SUCCESS in 3h 02m 31s