Fix tests and some underlying bugs

Author: larry-safran

Diff for: util/src/main/java/io/grpc/util/OutlierDetectionLoadBalancer.java

@@ -47,6 +47,7 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Random;
 import java.util.Set;
 import java.util.concurrent.ScheduledExecutorService;
@@ -1062,6 +1063,26 @@ public static class SuccessRateEjection {
         this.requestVolume = requestVolume;
       }
 
+      @Override
+      public int hashCode() {
+        return Objects.hash(stdevFactor, enforcementPercentage, minimumHosts, requestVolume);
+      }
+
+      @Override
+      public boolean equals(Object obj) {
+        if (this == obj) {
+          return true;
+        }
+        if (! (obj instanceof SuccessRateEjection)) {
+          return false;
+        }
+        return Objects.equals(stdevFactor, ((SuccessRateEjection) obj).stdevFactor)
+            && Objects.equals(
+                enforcementPercentage, ((SuccessRateEjection) obj).enforcementPercentage)
+            && Objects.equals(minimumHosts, ((SuccessRateEjection) obj).minimumHosts)
+            && Objects.equals(requestVolume, ((SuccessRateEjection) obj).requestVolume);
+      }
+
       /** Builds new instances of {@link SuccessRateEjection}. */
       public static final class Builder {