RATIS-2255. Migrate ratis-grpc to junit 5. (#1233)

Author: szetszwo

ratis-grpc/pom.xml

@@ -75,8 +75,8 @@
     </dependency>
 
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
       <scope>test</scope>
     </dependency>
     <dependency>

ratis-grpc/src/test/java/org/apache/ratis/grpc/MiniRaftClusterWithGrpc.java

@@ -33,7 +33,7 @@
 import org.apache.ratis.server.impl.RaftServerTestUtil;
 import org.apache.ratis.util.NetUtils;
 import org.apache.ratis.util.ReferenceCountedLeakDetector;
-import org.junit.Assert;
+import org.junit.jupiter.api.Assertions;
 
 import java.util.Optional;
 
@@ -104,9 +104,9 @@ public void assertZeroCopyMetrics() {
       RaftServer.Division division = RaftServerTestUtil.getDivision(server, id);
       final GrpcServicesImpl service = (GrpcServicesImpl) RaftServerTestUtil.getServerRpc(division);
       ZeroCopyMetrics zeroCopyMetrics = service.getZeroCopyMetrics();
-      Assert.assertEquals(0, zeroCopyMetrics.nonZeroCopyMessages());
-      Assert.assertEquals("Zero copy messages are not released, please check logs to find leaks. ",
-          zeroCopyMetrics.zeroCopyMessages(), zeroCopyMetrics.releasedMessages());
+      Assertions.assertEquals(0, zeroCopyMetrics.nonZeroCopyMessages());
+      Assertions.assertEquals(zeroCopyMetrics.zeroCopyMessages(), zeroCopyMetrics.releasedMessages(),
+          "Unreleased zero copy messages: please check logs to find the leaks. ");
     }));
   }
 }

ratis-metrics-default/pom.xml

@@ -49,11 +49,6 @@
       <artifactId>slf4j-api</artifactId>
     </dependency>
 
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter-engine</artifactId>

ratis-metrics-dropwizard3/pom.xml

@@ -53,11 +53,6 @@
       <artifactId>slf4j-api</artifactId>
     </dependency>
 
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter-engine</artifactId>