[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/220/ : SUCCESS in 1h 37m 27s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/213/ : UNSTABLE in 3h 44m 11s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/212/ : UNSTABLE in 4h 13m 13s