Revert "CLOUDSTACK-6003 fixing plus refactoring dispatcher" as it breaks API dispatching for commands having Map<String,String> as a parameter type

This reverts commit 447430c3df38c36d947c44c4aebd961d8cbb14c4.

Conflicts:
	api/src/org/apache/cloudstack/api/BaseCmd.java
	server/src/com/cloud/api/ApiDispatcher.java
	server/src/com/cloud/network/as/AutoScaleManagerImpl.java
	server/src/com/cloud/network/router/VirtualNetworkApplianceManagerImpl.java