Pass DOCKER_CONFIG to codequality docker image
checks if DOCKER_CONFIG is defined and pass env variable and mount docker config folder to codeclimate image
There is another MR, which updates codequality docker image to use DOCKER_CONFIG and pass it codeclimate images
Passing DOCKER_CONFIG might helpful when CODECLIMATE_PREFIX
is specified, and it points to proxy that requires authentication.
Edited by Sergei Kononov