support cico test coverage job

[nurali-techie]

Issue:
For PR #99, we have observed that the ci.centos.org PR build (coverage) check is failing with following error.

/bin/bash: cico_run_coverage.sh: No such file or directory

Link: https://ci.centos.org/job/devtools-fabric8-notification-coverage/1/console

Fix:
Check whether we can run_tests_with_coverage and get meaningful metrics out of it. If yes, plz add support for run_tests_with_coverage. If we find that the run_tests_with_coverage take similar (almost same) build time as compared to run_tests_without_coverage then we can only have run_tests_with_coverage.