[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/296/ : SUCCESS in 1h 33m 56s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/289/ : UNSTABLE in 3h 01m 50s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/289/ : SUCCESS in 3h 57m 45s