[NO ISSUE][HYR] Shorten SuperActivityOperatorNodePushable thread names

- Use SA in place of SuperActivityOperatorNodePushable when annotating thread names, for brevity

Change-Id: I73b6443492bb872c78f5a1756b124abda9222015
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/9663
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Ian Maxon <imaxon@uci.edu>
diff --git a/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/rewriter/runtime/SuperActivityOperatorNodePushable.java b/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/rewriter/runtime/SuperActivityOperatorNodePushable.java
index 1d8c774..79687ab 100644
--- a/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/rewriter/runtime/SuperActivityOperatorNodePushable.java
+++ b/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/rewriter/runtime/SuperActivityOperatorNodePushable.java
@@ -55,7 +55,7 @@
  * connected activities in a single thread.
  */
 public class SuperActivityOperatorNodePushable implements IOperatorNodePushable {
-    private static final String CLASS_SIMPLE_NAME = SuperActivityOperatorNodePushable.class.getSimpleName();
+    private static final String CLASS_ABBREVIATION = "SA";
     private final Map<ActivityId, IOperatorNodePushable> operatorNodePushables = new HashMap<>();
     private final List<IOperatorNodePushable> operatorNodePushablesBFSOrder = new ArrayList<>();
     private final Map<ActivityId, IActivity> startActivities;
@@ -224,7 +224,7 @@
                     try {
                         Thread.currentThread()
                                 .setName(Thread.currentThread().getName() + ":" + ctx.getJobletContext().getJobId()
-                                        + ":" + ctx.getTaskAttemptId() + ":" + CLASS_SIMPLE_NAME);
+                                        + ":" + ctx.getTaskAttemptId() + ":" + CLASS_ABBREVIATION);
                         action.run(op);
                     } catch (Throwable th) { // NOSONAR: Must catch all causes of failure
                         failures.offer(th);