Implement ManagementView.getDeploymentNamesForType to standard jbossas deployment types

We need to provide an api for determining the known deployment types (ear/war/ejb-jar/client-app-jar/rar/sar/mcbeans/...) in the ManagementView. This was the purpose of the getDeploymentNamesForType(String) method, but no ManagedDeployments are describing their type correctly as the deployer type was deprecated from the MC deployer api. It needs to be added back somewhere.