worker;cmd/jujud: Replace uniter with apiuniter

worker;cmd/jujud: Replace uniter with apiuniter

Uniter worker now uses only the API and the unit
agent was changed as needed to accomodate this.
Code in worker/apiuniter, which was already
reviewed before replaced the corresponding parts
in worker/uniter, so we can keep the history of
the old uniter source. Also, worker/apiuniter
was completely deleted as it's no longer needed.

Live tested with the local provider and the same
test used before - it all seems to work fine: relation
settings caching, deploying/recalling subordinates, etc.

With this, the uniter state-to-API migration is complete.

https://code.launchpad.net/~dimitern/juju-core/135-replace-uniter-with-apiuniter/+merge/185322

(do not edit description out of merge proposal)

[dimitern, 2013-09-12 17:03:13]

Please take a look.

[dimitern, 2013-09-12 17:06:19]

Please take a look.

[dimitern, 2013-09-12 17:12:26]

Please take a look.

[rog, 2013-09-12 17:31:31]

On 2013/09/12 17:12:26, dimitern wrote:
> Please take a look.

awesome stuff!
LGTM assuming it passes live ec2 tests.

[dimitern, 2013-09-13 09:16:43]

On 2013/09/12 17:31:31, rog wrote:
> On 2013/09/12 17:12:26, dimitern wrote:
> > Please take a look.
> 
> awesome stuff!
> LGTM assuming it passes live ec2 tests.

Yes, just tested, and indeed it passes an ec2 live test - the same one I used
with the local provider.

[dimitern, 2013-09-13 09:26:53]

Please take a look.