Fix bug [ 1854603 ] Prepare method is being called twice

Make workflows run in one single thread different from the main thread

base/src/org/compiere/wf/MWFProcess.java

@@ -333,8 +333,6 @@ public class MWFProcess extends X_AD_WF_Process
 			
 			//	Start new Activity...
 			MWFActivity activity = new MWFActivity (this, transitions[i].getAD_WF_Next_ID(), lastPO);
-			//new Thread(activity).start();
-			//..but not in another thread
 			activity.run();
 			
 			//	only the first valid if XOR
@@ -461,9 +459,11 @@ public class MWFProcess extends X_AD_WF_Process
 		{
 			//	Start first Activity with first Node
 			MWFActivity activity = new MWFActivity (this, AD_WF_Node_ID);
-			//async execution cause problem with transaction
-			//new Thread(activity).start();
-			activity.run();
+			Thread workerWF = new Thread(activity);
+			workerWF.setName(activity.getAD_Workflow().getName() + " "
+					+ activity.getAD_Table().getName() + " "
+					+ activity.getRecord_ID());
+			workerWF.start();
 		}
 		catch (Exception e)
 		{