[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/159/ : UNSTABLE in 1h 55m 52s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/152/ : SUCCESS in 2h 50m 53s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/151/ : UNSTABLE in 3h 02m 36s