Make method private

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Move StagerPool into DEA namespace

Since it does not apply to Diego

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Move instances reporters into DEA and Diego namespaces

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Namespace AppStagerTask under VCAP::CloudController::Dea

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Namespace StartAppMessage under VCAP::CloudController::Dea

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>
Move nats_messages into VCAP::CloudController::Dea

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>