pre-process desired LRPs to replace placeholders

also, stop building start messages; deal with desired LRPs directly, which are
now made generic

Signed-off-by: Ted Young <tyoung@pivotallabs.com>
deps

Signed-off-by: Ted Young <tyoung@pivotallabs.com>
remove all circus knowledge

Signed-off-by: Ted Young <tyoung@pivotallabs.com>
fix file server placeholder replacing

Signed-off-by: Simon Leung <leungs@us.ibm.com>
remove repaddrrelativetoexecutor

Signed-off-by: Simon Leung <leungs@us.ibm.com>
preprocess environment variables

Signed-off-by: Simon Leung <leungs@us.ibm.com>
remove env preprocessing

[#75735594]

Signed-off-by: Simon Leung <leungs@us.ibm.com>
Merge branch 'master' into az_balance

Conflicts:
	Godeps/Godeps.json
	Godeps/_workspace/src/github.com/cloudfoundry-incubator/runtime-schema/models/lrp_start_auction.go
	Godeps/_workspace/src/github.com/cloudfoundry-incubator/runtime-schema/models/lrp_start_auction_test.go
	handler/handler.go
	handler/handler_test.go
	integration/app_manager_runner/app_manager_runner.go
	integration/integration_test.go
	main.go
	start_message_builder/start_message_builder.go
	start_message_builder/start_message_builder_test.go