[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/171/ : SUCCESS in 1h 34m 00s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/164/ : SUCCESS in 3h 55m 36s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/163/ : UNSTABLE in 4h 25m 14s