__pycache__ in python2 directory? O_o

[Igor Gnatenko]

RPM build errors:
    Installed (but unpackaged) file(s) found:
   /usr/lib/python2.7/site-packages/__pycache__/site.cpython-35.pyc

This is from build of Flask. Looks really weird.

Also it has some weird file inside:
/usr/lib/python3.5/site-packages/flask/testsuite/test_apps/lib/python2.5/site-packages/SiteEgg.egg

Should we skip such things from RPM generator or we should remove that
or what? Thoughts?