Redesign mysql image to work in OpenShift as well

[hhorak]

This is a counter-proposal to PR #191, not meant in sense "let's make it my way", but rather to show in practice what I was talking about. I definitely don't say it must be this way, but where I'd like to get from here is to find a common way which will work for most people.

These changes are based on the code that from https://github.com/openshift/mysql, but it does not include some recent changes in the scripts. Even if the image is meant to work in OpenShift, it doesn't mean that it shouldn't work outside of OpenShift -- the opposite is true, the image should be usable on Atomic or normal Fedora Server/Workstation/Cloud without any issues as well.

I'd like to apology in advance that I won't be responsive in next two weeks, since I'll be off-line.

[sourcejedi]

5.6? But see below.

[sourcejedi]

The second commit I wanted to make was that the SCL image used restorecon inside Docker, which wouldn't do anything. So I'm happy that I couldn't find it in this version :).

[sourcejedi]

PS I should have said, I wish you well in your time offline, wherever that may be :).

[hhorak]

@sourcejedi Very sorry for long delay in responses. I've created a new variant of the PR (#219), that is based on recent code from https://github.com/openshift/mysql. Some of the issues you pointed are fixed there, thank you very much. Some are not yet (options for configuration, password handling), but I'd rather change those later, after thinking through it more.
Anyway, since there is the new PR #219 created, closing this one.