csatari 6c362ce53e Adding warning-is-error to doc building
As it is required in [1] warning-is-error should be
set for doc building. This change sets the flag and
corrects the warnings.

[1]: http://specs.openstack.org/openstack/docs-specs/specs/pike/os-manuals-migration.html

Change-Id: Ia93fd13645830cd8994ef283b72f31cb22cf3fe9
Depends-On: Ia750cb049c0f53a234ea70ce1f2bbbb7a2aa9454
Signed-off-by: csatari <gergely.csatari@nokia.com>
2017-07-13 10:11:15 +02:00
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