HBASE-10022 Fix the HE_EQUALS_USE_HASHCODE warning under hbase-hadoop1-compat (Liang Xie)

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1545250 13f79535-47bb-0310-9956-ffa450edef68

hbase-hadoop1-compat/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionSourceImpl.java

@@ -158,6 +158,11 @@ public class MetricsRegionSourceImpl implements MetricsRegionSource {
     return compareTo((MetricsRegionSourceImpl)obj) == 0;
   }
 
+  @Override
+  public int hashCode() {
+    return this.regionWrapper.getRegionName().hashCode();
+  }
+
   void snapshot(MetricsRecordBuilder mrb, boolean ignored) {
     if (closed) return;