Eclipse luna tests removal

I removed most of the tests as they are getting irrelevant soon anyway. Those tests are poking at BaseInstaller feature, not specific eclipse luna ones. My goal is to remove those tests as well from test_android.py and implements some BaseInstaller (bug #19). I'll get to that very soon.

The remaining test, which is really testing that eclipse-luna is installed is passing \o/

Do you want to handle the medium tests? (same, should be just inheriting) or do you want me to? See my few other comments as well (but apart from that +1 for merging, we are close!)