[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/537/ : UNSTABLE in 1h 42m 46s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/537/ : UNSTABLE in 3h 20m 35s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-14/255/ : UNSTABLE in 3h 41m 19s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/539/ : UNSTABLE in 4h 58m 10s