Refactor code after George's comments
Removes ModelHadoopAdapter as refectoring just wasn't worth it at this
point. Once this commit is made to track that change, the thin adapter
will be renamed to take its place.

Conflicts:
	elastic-runtime2/src/main/java/com/vmware/vhadoop/vhm/BootstrapMain.java
	elastic-runtime2/src/main/java/com/vmware/vhadoop/vhm/hadoop/HadoopAdaptor.java
Rename thin hadoop adapter to take its place as the sole hadoop adapter
Updates model to provide an easy way of waiting for responses to commands.
Currently that's only setTargetComputeNodeNum but it may include others in
the future
Updated fault injection tests to wait for response using the provided
utility functions
Removes block of commented code that's no longer needed