Fix trivial mismatch of license header

Hacking H102 checks for a literal version of the
Apache2 license header to match. Fix the trivial
mismatch. See
https://github.com/openstack-dev/hacking/blob/master/HACKING.rst
for how the license header should look like.

Change-Id: Ib5770bd447653c7b79aef084c29f09f8c32cf739
Merge "Fix trivial mismatch of license header"