Add setup.cfg to kolla tools pip data dir

kolla-build requires setup.cfg to fetch its version and right now it's not
installed to pip data dir.

Change-Id: Id1df6aab72314710d436cd7584c89bcda5d2b1a0
Closes-Bug: 1525949

setup.cfg

@@ -29,6 +29,7 @@ data_files =
     share/kolla/vagrant = vagrant/*
     share/kolla = tools/init-runonce
     share/kolla = tools/openrc-example
+    share/kolla = setup.cfg
 
 scripts =
     tools/kolla-ansible