Units and constraints handling in subordinates.

Units and constraints handling in subordinates.

Improve how unit scaling and constraint options are
handled in the ghost and deployed inspectors when a
service is deployed from a subordinate charm.

Also fixed a bug in the units count preventing
subordinates to be deployed in a juju-core 
sandbox/real environment.

QA:
- make devel/debug;
- deploy a principal charm, both the ghost 
  inspector and the deployed inspector 
  include unit scaling and constraints,
  everything works as expected;
- deploy a subordinate charm (e.g. puppet),
  inspectors don't show unit scaling and 
  constraints, everything works as expected.

https://code.launchpad.net/~frankban/juju-gui/subordinate-inspector/+merge/188339

(do not edit description out of merge proposal)

[frankban, 2013-09-30 13:54:51]

Please take a look.

[jeff.pihach, 2013-09-30 15:55:55]

LGTM Thanks for this!
QA OK

[frankban, 2013-09-30 16:04:24]

*** Submitted:

Units and constraints handling in subordinates.

Improve how unit scaling and constraint options are
handled in the ghost and deployed inspectors when a
service is deployed from a subordinate charm.

Also fixed a bug in the units count preventing
subordinates to be deployed in a juju-core 
sandbox/real environment.

QA:
- make devel/debug;
- deploy a principal charm, both the ghost 
  inspector and the deployed inspector 
  include unit scaling and constraints,
  everything works as expected;
- deploy a subordinate charm (e.g. puppet),
  inspectors don't show unit scaling and 
  constraints, everything works as expected.

R=jeff.pihach
CC=
https://codereview.appspot.com/14125043

[frankban, 2013-09-30 16:18:18]

Hey Jeff, thanks for the review!