[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/234/ : SUCCESS in 1h 38m 02s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/227/ : SUCCESS in 3h 02m 36s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/226/ : UNSTABLE in 3h 02m 22s