The file ownership and group was set to root for
'/etc/nova/migration/identity' because of which
user gets Permission denied error while trying to
do resize or live-migration.
Changing file ownership and group to nova allows
to do live-migration and resize successfully.
Change-Id: Id46ea6b0f953e6e23cd95bae0889df906ae933b2
(cherry picked from commit 2750aab287)