Tweaks to spec file to make it work with build scripts.
Made both version and release configurable in galera-obs.spec
refs #171 parametrized package name, correct openssl dependency
Squashed commit of the following:

commit b0f13a36724ca507f19c3555051b8729cebd304f Author: Teemu Ollakka
<teemu.ollakka@codership.com> Date: Tue Nov 4 16:02:37 2014 +0200

    Proper openssl dependency.

commit 78d6f7e4d8392c93e14b30bff1a0c40467650c29
Author: Teemu Ollakka <teemu.ollakka@codership.com>
Date:   Tue Nov 4 13:10:54 2014 +0200

    Parametrized package name.
Merge remote-tracking branch 'ottok/3.x' into 3.x

Conflicts:
	scripts/packages/galera-obs.spec
Merge branch '3.x' of https://github.com/codership/galera into 3.x