Description of problem:

### Kind of issue

Infra request:

Setup GCOV & LCOV job for gluster-block project which should run nightly or weekly to help visualize test & line coverage achieved, which intern help us understand:

* how often each line of code executes
* what lines of code are actually executed
* how much computing time each section of code uses

and work on possible optimizations.

### Other useful information

Repo:
https://github.com/gluster/gluster-block

To start with, we can build like we do with [travis](https://github.com/gluster/gluster-block/blob/master/extras/docker/Dockerfile.fedora29)

Need to install run time dependencies:
# yum install glusterfs-server targetcli tcmu-runner

then start glusterd
# systemctl start glusterd

Then run simple test case
# [./tests/basic.t](https://github.com/gluster/gluster-block/blob/master/tests/basic.t)