[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/186/ : SUCCESS in 1h 33m 53s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/179/ : SUCCESS in 3h 30m 28s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/178/ : UNSTABLE in 2h 58m 03s