The commands that do not require authentication sometimes still need
to call ClientManager.is_network_endpoint_enabled() to see if Neutron
is available.  Optimize the paths a bit to skip auth when it is not
necessary; the upshot is Neutron will be assumed in these cases now.

This gets a LOT cleaner when it appears is a future osc-lib.

Change-Id: Ifaddc57dfa192bde04d0482e2cdcce111313a22a

osc-lib 1.2 is minimum and now handles the password prompting.

Change-Id: Ie11ad64796d3a89c7396b321c34947d622d1ed39

OSC networking commands need to authenticate to get
service catalog, then decide to show nova-network or
neutron command help message. Fake token and fake
auth_type in prepare_to_run_command() casue os-cloud-config
use AdminToken auth plugin, but pass all the auth information
(include: username, password and so on) to it, that casue the
class initialization error. Pop the fake token and url, then
try to load auth plugin again to fix the issue.

Change-Id: I8b140f0b0a60681fc2a35a013bb0c84ff8cb9589
Closes-Bug: #1650026

Auth option prompting happens waaaay to early in the default
os-client-config flow, we need to defer it until adter the commands
have been parsed.  This is why ClientManager.setup_auth() exists,
as it is not called until the first attempt to connect to a server
occurs.  Commands that do not require authentication never hit this.

Also, required options were not being enforced.  By doing this we handle
when no authentication info is present, we fail on missing auth-url rather
than attempt to prompt for a password (default auth is password).

Closes-Bug: 1619274
Change-Id: Ia4eae350e6904c9eb2c8507d9b3429fe52418726

Leaving the pw_func uninitialize in osc-lib turned out to be a
bad idea as the test to prompt in setup_auth() doesn't check
for a callback of None.

Also, release note

Change-Id: I8f875fa8a942d02a040238359ee22c603a4e5956

We start by fixing this in the already-present OSC_Config class so OSC
can move forward.  This change needs to get ported down into
os-client-config in the near future, maybe even soon enough to make the
client library freeze this week.

* Add the pw-func argument to the OSC_Config (or OpenStackConfig) __init__()
* When looping through the auth options from the KSA plugin look for any
  that have a prompt defined and do not have a value already, so ask for one.

Closes-bug: #1617384
Change-Id: Ic86d56b8a6844516292fb74513712b486fec4442

Convert to using ClientManager and OpenStackShell from osc-lib.
* Change all internal uses of ClientManager private attributes that are
  now public in osc-lib's ClientManager.  Leave back-compat copies in
  place in OSC's clientManager so we don't break plugins.
* Put some work-arounds in place for changes in osc-lib that we need until
  a new release makes it through the g-r and u-c change process.
* Add a test for Unicode decoding of argv in shell.main() to parallel
  the one in osc-lib.

Change-Id: I85289740d4ca081f2aca8c9b40ec422ad25d302c

This effectively reverts https://review.openstack.org/#/c/341618/.

Change-Id: Ic8e53e17b4a5352b0c00e39bcb5d248b057540a9

* Add compatibility for plugin v2 interface removed from osc-lib
* ClientManager.is_network_endpoint_enabled() is wrapper for
  new is_service_available()

Change-Id: I6f26ce9e4d0702f50c7949bacfbeeb0f98cddb5d

These were removed prematurely from osc-lib (by me) but the real fix in
https://review.openstack.org/329189 is having racy functional test issues
that may be related to osc-lib, so let's clear this up while we fix that...

Change-Id: I8f67466967751fdf6fd24ae1b16ccee2aec52323