GP-2968: per review comment (cleanup)

GP-2968: prompting ReviewTool
GP-2968: my bad, NPE check was hanging the launch
GP-2968: fix for passing Enums; fix for toMap'ing nulls
GP-2968:  refactoring args logic into loop w/ handling for exception
GP-2968: fix for NPE & stored parameter errors

Ghidra/Debug/Framework-Debugging/src/main/java/ghidra/dbg/target/TargetLauncher.java

@@ -139,4 +139,5 @@ public interface TargetLauncher extends TargetObject {
 	 * @return a future which completes when the command is completed
 	 */
 	public CompletableFuture<Void> launch(Map<String, ?> args);
+
 }