CI: Configure project for gitlab

* Use headless Chromium as the browser for selenium and karma tests.
* Make database host configurable for developer setting.
* Add .gitlab-ci.yml

Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
1 job for <span class="ref-name">gitlab-ci-test</span> in 1 minute and 5 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
canceled #2911
test

00:01:05