XD-677 StreamDeployer no longer parses for undeploy

destroy tap was calling the parser to get the modules needed to undeploy before delete. The parser was failing to resolve a reference to an already destroyed stream.

Note that parser is still required for deploy since the sourceChannel and sinkChannel fields required for deploy  in the deployment request created by the parser and not available via the StreamDefinition. We may want to do some refactoring to remove the parser dependency at some point.