Fix the bug of "Error spelling of 'occured'"
Fix the bug of "Error spelling of 'occured'"

The word "occured" should be spelled as "occurred".
So it is changed.

Change-Id: Ie10c31030f64df6d78f1292bc7730c7469f3972f
Closes-Bug: #1501197

openstack/sahara,egafford/sahara,tellesnobrega/sahara,egafford/sahara,tellesnobrega/sahara,openstack/sahara