Rename replica-related fields

Author: farost

proto/server.proto

@@ -24,14 +24,14 @@ message ServerManager {
 
 message Server {
     optional string address = 1;
-    optional ReplicaStatus replica_status = 2;
+    optional ReplicationStatus replication_status = 2;
 
-    message ReplicaStatus {
-        uint64 replica_id = 1;
-        optional ReplicaRole replica_role = 2;
+    message ReplicationStatus {
+        uint64 id = 1;
+        optional Role role = 2;
         optional uint64 term = 3;
 
-        enum ReplicaRole {
+        enum Role {
             Primary = 0;
             Candidate = 1;
             Secondary = 2;