[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/266/ : SUCCESS in 1h 40m 14s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/259/ : UNSTABLE in 4h 04m 17s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/259/ : UNSTABLE in 4h 38m 42s