revert Spark UI Job Group labels

prevent certain regressions when the Job Group labels set by the platform are no longer available for parsing.  Labels set by the platform contain tokens that are necessary to preserve referential integrity under certain conditions.  (Which conditions?)

src/main/scala/com/databricks/labs/overwatch/pipeline/ETLDefinition.scala

@@ -27,9 +27,18 @@ class ETLDefinition(
 
     val transformedDF = transforms.foldLeft(verifiedSourceDF) {
       case (df, transform) =>
-	df.sparkSession.sparkContext.setJobGroup(
-          s"${module.pipeline.config.workspaceName}:${module.moduleName}",
-          transform.toString)
+
+	/* 
+ 	 * reverting Spark UI Job Group labels for now
+   	 *
+	 * TODO: enumerate the regressions this would introduce
+	 *       when the labels set by then platform are replaced
+	 *       this way.
+	 * df.sparkSession.sparkContext.setJobGroup(
+         *    s"${module.pipeline.config.workspaceName}:${module.moduleName}",
+         *    transform.toString)
+	 */
+
         df.transform( transform)
     }
     write(transformedDF, module)