StopLRPInstance -> ActualLRP

Signed-off-by: Alex Suraci <asuraci@pivotal.io>
Rework API for Get & DELETE ActualsByGuidAndIndex

* Get & Delete for ActualsByProcessGuidAndIndex return a single instance
* Simplify the routes for actual lrp -> /v1/actual_lrps
* Fix the loggers

[#83638702]
Actual LRP states are now strings

- add unclaimed, change starting to claimed

[#83638702]

Signed-off-by: Michael Fraenkel <fraenkel@us.ibm.com>
Adjust to LRP changes

* StartActualLRP
* 404 when ActualLRP not found

[#83638702]

Signed-off-by: Eric Malm <emalm@pivotal.io>