Improve event monitoring/callbacks

Improve the way we monitor changes within the Juju model, by maintaining
a single observer with an Application filter. This reduces the number of
duplicate callbacks being fired, and decreases the chatter between the
controller and client.

Signed-off-by: Adam Israel <adam.israel@canonical.com>

add python-all for build

Signed-off-by: Mike Marchetti <mmarchetti@sandvine.com>

add devops stages for pipeline

Signed-off-by: Mike Marchetti <mmarchetti@sandvine.com>

Improve N2VC performance/functionality

- Refactor test to support multi-vdu charms.
- Add support for deploying multi-vdu charms.
- Execute the initial-config-primitives

This is the first commit to add support for executing the
initial-config-primitive(s). There are some decisions that still need to
be made: how do we report primitive execution back to the
caller/callback in a meaningful way.

Signed-off-by: Adam Israel <adam.israel@canonical.com>
Change-Id: Icc0ce41d256930b337c9097af9edcae2694207e8

New N2VC interface + updated libjuju

This commit introduces the Python3 N2VC module, which acts as a standard
interface to the VCA.

The goal of this is to provide a common way for modules to interface
with the VCA.

- Updated libjuju from 0.6.1 to 0.7.3

Signed-off-by: Adam Israel <adam.israel@canonical.com>
Change-Id: Ide70fb5ae5797eb6486de24653dc09a23f9c009e

Update libjuju

- fix licensing quirks
- refresh against libjuju master

Signed-off-by: Adam Israel <adam.israel@canonical.com>

Initial import of N2VC

This import kicks off the N2VC module.

Signed-off-by: Adam Israel <adam.israel@canonical.com>

Merge commit '19031b24b523c872c1ac367821dc60c950a09755' as 'modules/libjuju'

Squashed 'modules/libjuju/' content from commit c50c361

git-subtree-dir: modules/libjuju
git-subtree-split: c50c361a8b9a3bbf1a33f5659e492b481f065cd2

Initial empty repository