Let pip install unittest2; pip installation can conflict with the
packaged version.
Cherry-picked from b0595235a2374451c3f899fb893ad989a74b04d1
Partial-Bug: #1430592
Conflicts:
files/rpms-suse/general
files/rpms/general
Change-Id: I08a00b92c3578abfdb0300a37eeda117d4c76e92