fixed test case and number to hex

Author: tonyjongyoonan

xds/src/main/java/io/grpc/xds/WeightedRoundRobinLoadBalancer.java

@@ -348,7 +348,7 @@ static final class StaticStrideScheduler {
     private final int sizeDivisor;
     private final Random random;
     private final AtomicInteger sequence;
-    private static final int K_MAX_WEIGHT = 65535;
+    private static final int K_MAX_WEIGHT = 0xFFFF;
     private static final long UINT32_MAX = 0xFFFF_FFFFL;
 
     StaticStrideScheduler(float[] weights, Random random) {

xds/src/test/java/io/grpc/xds/WeightedRoundRobinLoadBalancerTest.java

@@ -1084,8 +1084,8 @@ public void testManyComplexWeights2() {
       pickCount.put(result, pickCount.getOrDefault(result, 0) + 1);
     }
     for (int i = 0; i < 8; i++) {
-      assertThat(Math.abs(pickCount.getOrDefault(i, 0) / 10000.0 - weights[i] / totalWeight) )
-          .isAtMost(2);
+      assertThat(Math.abs(pickCount.getOrDefault(i, 0) / 1000.0 - weights[i] / totalWeight) )
+          .isAtMost(0.01);
     }
   }