Disallow launch-scheduled with wait which doesn't make sense and isn't tested

Former-commit-id: 84e6f8c

Author: denis-yuen

seqware-pipeline/src/main/java/net/sourceforge/seqware/pipeline/plugin/WorkflowPlugin.java

@@ -143,12 +143,17 @@ public ReturnValue init() {
     }
 
     if (options.has("workflow-engine")){
-      if (!ENGINES.contains(options.valueOf("workflow-engine"))){
+      if (!ENGINES.contains((String)options.valueOf("workflow-engine"))){
         Log.error("Invalid workflow-engine value. Must be one of: "+ENGINES_LIST);
         ret.setExitStatus(ReturnValue.INVALIDARGUMENT);
         return ret;
       }
     }
+    if (options.has(WAIT) && options.has(LAUNCH_SCHEDULED)){
+        Log.error("Cannot launch scheduled workflows with wait");
+        ret.setExitStatus(ReturnValue.INVALIDARGUMENT);
+        return ret;
+    }
 
     // wrong assumption here I think, --host is possible even when not
     // scheduling or waiting