[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/235/ : SUCCESS in 1h 43m 10s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/228/ : SUCCESS in 3h 43m 36s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/227/ : UNSTABLE in 3h 01m 14s