AddFloatingIP refers to an old nova proxy API to neutron that was
deprecated in nova. The neutron API for floating IP associate requires
a port to be specified. Currently, the code is selecting the first port
if the server has multiple ports. But, an attempt to associate the
first port with a floating IP can fail if the first port is not on a
network that is attached to an external gateway.

In order to make the command work better for users who have a server
with multiple ports, we can:

  1. Select the port corresponding to the fixed_ip_address, if one was
     specified

  2. Try to associate the floating IP with each port until one of the
     attempts succeeds, else re-raise the last exception.
     (404 ExternalGatewayForFloatingIPNotFound from neutron)

This also fixes incorrect FakeFloatingIP attributes that were being set
in the TestServerAddFloatingIPNetwork unit tests, which were causing
the tests to use None as parsed args for ip-address and
--fixed-ip-address and thus bypassing code in the
'if parsed_args.fixed_ip_address:' block.

Task: 27800
Story: 2004263

Change-Id: I11fbcebf6b00f12a030b000c84dcf1d6b5e86250
(cherry picked from commit 013c9a4f3a44cb0b81fc7affe9b933e701cb5dba)
(cherry picked from commit e09c358e7b35ac938595aad90c5c42dfe402a42a)

Compute API version >= 2.37 requires a 'networks' value in
the server create request. The novaclient CLI defaults this
to 'auto' if not specified, but the novaclient ServerManager.create
python API binding code does not, as it wants clients to be explicit.

For the purposes of the OSC CLI, we should follow suit and if the
user is requesting OS_COMPUTE_API_VERSION>=2.37 without specific
nics, we should just default to 'auto'.

Change-Id: Ib760c55e31209223338a4086ff1f4fee88dc6959
Closes-Bug: #1750395
(cherry picked from commit 1008544882fbdae16b045abca05cf3e2e8a14787)
(cherry picked from commit 4944d4eaa9aaeffdee358680550ac7d7f0c6e8d8)

In API microversion 2.25 Nova removed the disk_over_commit parameter
to the live migration server action. This patch makes sure that we
don't include it in our request if we're running with 2.25 or higher.

Story: #2002963
Task: #22966
Change-Id: I1bbdd33be96d82422a05982508e370237c3560f3
(cherry picked from commit d6121782d3aa6a95b883220b27a154e641b61f7f)

Migrate uses the same mechanism in the backend than Resize and so the
steps and step names are similar. Currently when using the --wait
option with 'migrate', we wait forever because the status won't get to
active until the user performs an action. This makes it return on
verify_resize status just like 'resize' does, so that the user can
perform the next manual step.

Change-Id: Ie1aeac52506bc8801f88fd6a6eb4f6094cf20050
Story: 2001994
Task: 19620
(cherry picked from commit de9a6fc0700d821f9fca6bf347407eccd87f0064)

a)

/os-floating-ips was removed in Compute API 2.36 and from novaclient's
Python API in 10.0

Add to api.computev2:
floating_ip_add()
floating_ip_remove()

Convert add floating IP command to nova-net/neutron split:
"server add floating ip"
"server remove floating ip"

b)

/os-hosts was removed in Compute API 2.43 and from novaclient's
Python API in 10.0.

Add to api.computev2:
host_list()
host_set()
host_show()

Convert host commands to use intenal api:
"host list"
"host set"
"host show"

c)

The introduction of the Network-style commands into the server group
broke cliff's autoprogram directive as it executes the get_parser() methods
without fully initializing the Command object.

NOTE: This is really three reviews squashed to get through the gate in one pass.

Closes-Bug: #1745795

Change-Id: I5116086f9a9e4b2b31a744bf8f4558c79f0bfe59
(cherry picked from commit 53e7aab7ed4d6c981ca067c1db8bce290a5f0055)

Per API reference, only 'changes-since' is accepted and the variant
with underscore is ignored, making the CLI functionality broken.

[dtroyer] added release note and fixed unit tests.

Change-Id: I0c596531a8af03da17d5ce39d75b12e941403aa5
Closes-Bug: 1732216

This command will detach a server from a network. All server's
neutron ports that belongs to the specified networks will be removed.

Change-Id: I83a064ed62ab00c6f1016900b9cf30f1c15b8382

Change-Id: I27afca9e826378dbcb7feb7528e0c65c528b04b0
Closes-Bug: #1703278