Return the uuid of the executed primitive

Return the uuid of the queued primitive from ExecutePrimitive, the first
step in allowing the orchestrator check the status and output of the primitive.

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