enable compiling, testing, packaging from the WC (bnc#790490)

[mvidner]

groundwork for SP3 features

[mvidner]

BTW for full benefits this also needs a companion change in devtools (already merged) but it is a packaging-time dependency, not build- or run-time, so it is not expressed in the spec file.

[jsuchome]

Is it actually needed for SP3 feature? Shouldn't it be better to leave changes like this for Factory/SLE12?

[kobliha]

As we will have to maintain the module for a few more years, every forward-looking approach is good IMO.

[mvidner]

1. Needed? No-but-yes. 2) For a development branch only? No.

2. Benefits vs. costs and risks: enabling easier testing is important for a maintenance branch where we want to add tests to avoid regressions. (Note that I even target SP2, not only SP3.) That outweighs the cost of restructuring the git tree.
   Concerning the risks, I see them as low: the RPM tree stays the same, as long as I made no error in Makefiles. I have now checked the file lists of the resulting RPMs to be the same.
   So being useful and low-risk qualifies it for here.

3. The feature would be possible without it, but I've developed it on the new tree already. (It was helpful in adding these tests.)

[mchf]

Definitely needed and useful. Git is able to track changes even when a file is renamed, so I don't see any problem.