[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/258/ : SUCCESS in 1h 39m 49s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/251/ : UNSTABLE in 4h 07m 24s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/251/ : SUCCESS in 3h 12m 25s