armando-migliaccio 8faa5f076b Handle IPAddressGenerationFailure during get_dhcp_port
If a network/subnet is deleted while the dhcp agent is trying
to get/create a dhcp port for that network, the exception
will be raised because no IP Allocation Range is available.

However, this particular failure mode causes just noise, because
the dhcp agent can cope with it without problems.

A follow-up patch will deal with the other exception traces during
create_dhcp_port

Partial-bug: #1253344

Change-Id: I7fe35455ce905daa22ff96367e120864a7d3fb92
2013-11-21 13:08:14 -08:00
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