Merge lp:~rogpeppe/juju-core/050-juju-provisioning-service into lp:~juju/juju-core/trunk

[Roger Peppe]

WIP: add "agent" services and run the provisioner as one.

This is extremely controversial, but seems to me like a very
cheap and arguably elegant way to provide a state
entity for any agent that requires one (for instance the PA).

Doesn't currently work because container is broken.

https://codereview.appspot.com/6493101/

Unmerged revisions

465. By Roger Peppe on 2012-09-07

container: fix test

464. By Roger Peppe on 2012-09-07

cmd/jujud: remove agentName argument to NewUpgrader

463. By Roger Peppe on 2012-09-07

merge 051-authorize-internal-traffic

462. By Roger Peppe on 2012-09-07

state: add AddAgentService; cmd/jujud: add provisioning agent setup

461. By Roger Peppe on 2012-09-07

state: add IsAgent etc

460. By Roger Peppe on 2012-09-07

cmd/jujud: make provisioner use unit

459. By Roger Peppe on 2012-09-06

container: test for juju_* service

458. By Roger Peppe on 2012-09-04

container: recognise juju- service

457. By Gustavo Niemeyer on 2012-09-04

mstate/presence: foundation for presence handling

R=rog, TheMue
CC=
https://codereview.appspot.com/6495079

456. By Roger Peppe on 2012-09-03

juju: always connect to State.

All uses of juju.Conn other than Bootstrap and Destroy require a state
connection, so make State an exported field of Conn and connect to it
when creating the Conn.

The few places that call Bootstrap can easily call Environ.Bootstrap
instead.

Also add environs.NewFromName to make it easier to open an
environment, rename juju.NewConn to juju.NewConnFromName, and add
juju.NewConnFromEnviron to join the dots.

R=TheMue, niemeyer
CC=
https://codereview.appspot.com/6488077