[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/105/ : UNSTABLE in 1h 52m 54s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/96/ : UNSTABLE in 2h 47m 52s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/97/ : UNSTABLE in 3h 00m 40s