Adit Sarfaty 9767d9e7c9 Add safty checks when getting port provider securtiy groups
If for some reason during update-port the original port does not have the
provider security groups attribute, it may fail.

Change-Id: Id6af4c714fd3dfd5fe8958b1f061d313c14d0f46
2019-01-03 12:42:17 +02:00
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