HADOOP-14400. Fix warnings from spotbugs in hadoop-tools. Contributed by Weiwei Yang.

hadoop-tools/hadoop-sls/src/main/java/org/apache/hadoop/yarn/sls/SLSRunner.java

@@ -216,6 +216,13 @@ public class SLSRunner extends Configured implements Tool {
     return Collections.unmodifiableMap(simulateInfoMap);
   }
 
+  /**
+   * @return an unmodifiable view of the simulated info map.
+   */
+  public static Map<String, Object> getSimulateInfoMap() {
+    return Collections.unmodifiableMap(simulateInfoMap);
+  }
+
   public void setSimulationParams(TraceType inType, String[] inTraces,
       String nodes, String outDir, Set<String> trackApps,
       boolean printsimulation) throws IOException, ClassNotFoundException {