WIP - Fix N2VC integration issues

This fixes a couple issues:

- Bump up the version of N2VC used, which fixes the updating of deployment status
- Add a new 'params' parameter to DeployCharms to address rw_mgmt_ip.
- RemoveCharms now succeeds
- Explicitly generate and store application name, per conversation

I've verified this executes the initial-config-primitive, and now
correctly sets the rw_mgmt_ip.

Still TODO:
- There still seems to be an occasional block when deploying a network
service with multiple charms, where one charm hangs in DeployCharms.
Race condition TBD.

Signed-off-by: Adam Israel <adam.israel@canonical.com>
Change-Id: Idf630d7ace375bd508d45a7140efac2cda609ae0