Revert "HDFS-5079. Cleaning up NNHAStatusHeartbeat.State from DatanodeProtocolProtos. Contributed by Tao Luo."

This reverts commit 4c8db6009291001b685b63f05b59a084972df8d4.

Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
	hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelper.java

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/PBHelper.java

@@ -26,7 +26,6 @@ import com.google.protobuf.ByteString;
 
 import org.apache.hadoop.fs.StorageType;
 import org.apache.hadoop.ha.HAServiceProtocol.HAServiceState;
-import org.apache.hadoop.ha.proto.HAServiceProtocolProtos;
 import org.apache.hadoop.hdfs.DFSUtilClient;
 import org.apache.hadoop.hdfs.protocol.Block;
 import org.apache.hadoop.hdfs.protocol.DatanodeID;
@@ -772,10 +771,10 @@ public class PBHelper {
       NNHAStatusHeartbeatProto.newBuilder();
     switch (hb.getState()) {
       case ACTIVE:
-        builder.setState(HAServiceProtocolProtos.HAServiceStateProto.ACTIVE);
+        builder.setState(NNHAStatusHeartbeatProto.State.ACTIVE);
         break;
       case STANDBY:
-        builder.setState(HAServiceProtocolProtos.HAServiceStateProto.STANDBY);
+        builder.setState(NNHAStatusHeartbeatProto.State.STANDBY);
         break;
       default:
         throw new IllegalArgumentException("Unexpected NNHAStatusHeartbeat.State:" +

hadoop-hdfs-project/hadoop-hdfs/src/main/proto/DatanodeProtocol.proto

@@ -31,7 +31,6 @@ option java_generic_services = true;
 option java_generate_equals_and_hash = true;
 package hadoop.hdfs.datanode;
 
-import "HAServiceProtocol.proto";
 import "hdfs.proto";
 import "erasurecoding.proto";
 import "HdfsServer.proto";
@@ -214,7 +213,11 @@ message HeartbeatRequestProto {
  * txid - Highest transaction ID this NN has seen
  */
 message NNHAStatusHeartbeatProto {
-  required hadoop.common.HAServiceStateProto state = 1;
+  enum State {
+    ACTIVE = 0;
+    STANDBY = 1;
+  }
+  required State state = 1; 
   required uint64 txid = 2;
 }