Fix TestMiniClusterLoadParallel related failures

Author: apurtell

hbase-common/src/test/java/org/apache/hadoop/hbase/util/LoadTestKVGenerator.java

@@ -33,11 +33,10 @@
 public class LoadTestKVGenerator {
 
   private static final Logger LOG = LoggerFactory.getLogger(LoadTestKVGenerator.class);
-  private static final Random RNG = new Random();
   private static int logLimit = 10;
 
   /** A random number generator for determining value size */
-  private final Random randomForValueSize = new Random();
+  private Random randomForValueSize = new Random();
 
   private final int minValueSize;
   private final int maxValueSize;
@@ -111,9 +110,9 @@ private static byte[] getValueForRowColumn(int dataSize, byte[]... seedStrings)
         seed += bytesString.hashCode();
       }
     }
-    RNG.setSeed(seed);
+    Random seededRandom = new Random(seed);
     byte[] randomBytes = new byte[dataSize];
-    RNG.nextBytes(randomBytes);
+    seededRandom.nextBytes(randomBytes);
     return randomBytes;
   }