[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/522/ : UNSTABLE in 1h 34m 18s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/521/ : SUCCESS in 3h 21m 36s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-14/239/ : SUCCESS in 3h 28m 18s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/524/ : UNSTABLE in 4h 26m 16s