Updated openstack/openstack
Project: openstack/nova  beca18af16ab02784c5ecc27ea269e5e7b83d2e6
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Add apache2 license header to appropriate files for enabling H102

Apache2 license says that each source file should include the license
header. However, some non empty files don't have it. And we already have
a hacking rule (H102) for this.
This commit fixes them and enables the rule.

Change-Id: I68fa0e1ee43ed28d6b470c0ffff963c095be8283