Do not duplicate name in release_name

In production I prefer to have concise precise names and not something out-of-control randomly generated.

For example nginx=>nginx, app1=>app1, etc...

Of course non production or duplicates have some prefixes or stuff like that.

So my cluster is going to run one main "gitlab-runner"

Before that MR, by passing helm name "gitlab-runner" final name was "gitlab-runner-gitlab-runner-hijsdhu7"

PS: Not my caprice. Just another best practice developed in community.

closes #142