Gary Kotton a81cc24248 Only delete VLAN information after Quantum network is deleted
Fixes bug 1030271

In the case where a network is deleted and there is a VLAN tag in a
separate table then the tag should only be deleted if the network
is deleted.

Change-Id: I99130f863928abf30a521e9a2b6d1233a274d9c6
2012-07-28 14:08:47 -04:00
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