[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/521/ : UNSTABLE in 1h 42m 08s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/520/ : UNSTABLE in 3h 21m 16s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-14/238/ : UNSTABLE in 3h 34m 48s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/523/ : UNSTABLE in 3h 46m 43s