Update oslo-incubator common __init__.py
Update oslo-incubator common __init__.py

Changes -
 * Add copyright text to openstack/common/__init__.py

Change-Id: Icdbd9ba1055a1133b70784e4c4b50774b44edfa6

openstack/sahara-dashboard,openstack/sahara-dashboard,openstack/sahara-dashboard,openstack/sahara-dashboard