Testing of one karaf4 feature may take more than 10 minutes

A good examples of this bug would be [1],[2]. Basicly singleFeatureTest somethimes failes just with - Build timed out (after 360 minutes). Marking the build as failed - which is timeout for whole build. Maximum time for one feature should be 10 minutes, But in those two examples you can see that time exceeds this 10 mins by far more.

[1] https://jenkins.opendaylight.org/releng/job/netconf-verify-carbon-mvn33-openjdk8/1685/console
[2] https://jenkins.opendaylight.org/releng/job/netconf-verify-carbon-mvn33-openjdk8/1678/console