[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/140/ : SUCCESS in 1h 31m 21s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/132/ : UNSTABLE in 3h 18m 41s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/132/ : UNSTABLE in 3h 58m 35s