This updates the help string for [neutron]provisioning_network
configuration option to indicate that the value can also be a
network name.
The release note for this new configuration option is also
updated.
This is a follow up to b6a2919b6198c8fb24d6f7e597f79a08f6ffe049.
Change-Id: I5773b20c5578fa4d14f80de9119e442edfe98dd0
Names are easier to use for humans, so let's allow them.
The actual name -> UUID convertion happens during validation and its
result is cached for each interface instance.
This change will allow recreating a network without changing Ironic
configuration or setting a network name in advance (e.g. by an installer).
Note that when names are used, an administrator is responsible for ensuring
that no other networks have the same name (names are not unique in Neutron).
Change-Id: I9905bdc3f778310ba191b2bed6eb11bad11a2846
Closes-Bug: #1614938