Remove stale pyc files when running the cover job
Remove stale pyc files when running the cover job

The cover job runs the unit tests and having stale
pycs can skew those results, so remove the pyc files
before running the tests with --coverage.

Change-Id: I7393d2df36e715dbf53ba9ae6a077bdc8e79b5a5

klmitch/nova,rahulunair/nova,hanlind/nova,mahak/nova,hanlind/nova,sebrandon1/nova,klmitch/nova,rajalokan/nova,rajalokan/nova,mikalstill/nova,rajalokan/nova,sebrandon1/nova,Juniper/nova,phenoxim/nova,klmitch/nova,phenoxim/nova,alaski/nova,vmturbo/nova,cloudbase/nova,hanlind/nova,rahulunair/nova,rahulunair/nova,mahak/nova,openstack/nova,mahak/nova,alaski/nova,rajalokan/nova,gooddata/openstack-nova,mikalstill/nova,jianghuaw/nova,sebrandon1/nova,jianghuaw/nova,gooddata/openstack-nova,mikalstill/nova,Juniper/nova,cloudbase/nova,jianghuaw/nova,gooddata/openstack-nova,vmturbo/nova,klmitch/nova,vmturbo/nova,openstack/nova,vmturbo/nova,jianghuaw/nova,Juniper/nova,Juniper/nova,cloudbase/nova,openstack/nova,gooddata/openstack-nova