Rework instance actions to work with cells

In a cells setup an instance action is recorded at the global cell level
while events try to get recorded in a child cell compute node or
scheduler.  The event recording fails because it can't find an action to
link to.  This patch adds the recording of actions at the child cell
level, and changes the API extension to query the db in a child cell for
the record of actions and events.

This does not address the fact that an action is recorded at the global
cell level.

Bug 1132935
Change-Id: I5831f146397e7afa2d93d26c5d6f9abb9bc6670d
Add conductor to nova-all.

The conductor service was missing so running nova-all no longer results
in a complete environment.

This patch adds conductor to the binary list and updates the code to
handle the different way in which conductor specifies the topic and
manager.

Fixes bug 1152371

Change-Id: I4862ad66216ab980e8636e9f3cdbabbace6ee73c
Merge "Rework instance actions to work with cells"
Merge "Add conductor to nova-all."