[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/227/ : SUCCESS in 1h 37m 42s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/220/ : UNSTABLE in 3h 43m 23s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/219/ : UNSTABLE in 3h 03m 20s