[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/172/ : SUCCESS in 1h 39m 41s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/165/ : UNSTABLE in 2h 59m 40s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/164/ : UNSTABLE in 2h 58m 12s