update gitignore for python and .testrepository
update gitignore for python and .testrepository

ignore python byte-compiled files
and ignore the folder, '.testrepository', generated from tox command.

Change-Id: Ic0208ea2e7e1c046a3a730cbd83f676ce44ed2ae
Closes-Bug: #1491267

coolsvap/kolla,rajalokan/kolla,GalenMa/kolla,toby82/kolla,tonyli71/kolla,chenzhiwei/kolla,rahulunair/kolla,mandre/kolla,intel-onp/kolla,limamauricio/mykolla,openstack/kolla,chenzhiwei/kolla,rajalokan/kolla,toby82/kolla,limamauricio/mykolla,intel-onp/kolla,stackforge/kolla,rahulunair/kolla,negronjl/kolla,fdumpling/kolla,mandre/kolla,limamauricio/mykolla,coolsvap/kolla,toby82/kolla,dardelean/kolla-ansible,fdumpling/kolla,negronjl/kolla,negronjl/kolla,coolsvap/kolla,rajalokan/kolla,nihilifer/kolla,fdumpling/kolla,mrangana/kolla,chenzhiwei/kolla,tonyli71/kolla,dardelean/kolla-ansible,GalenMa/kolla,openstack/kolla,stackforge/kolla,mandre/kolla,nihilifer/kolla,dardelean/kolla-ansible,stackforge/kolla,mrangana/kolla