[test-results] Stable check of asterisk failed

[asteriskteam at digium.com]

Build failed.

- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-11/226/ : SUCCESS in 1h 43m 14s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-13/219/ : UNSTABLE in 2h 51m 38s
- https://jenkins.asterisk.org/jenkins/job/periodic-asterisk-master/218/ : SUCCESS in 4h 31m 31s