Use consistent protobuf media type

Author: jlisam

plugin/src/main/java/com/flit/protoc/gen/server/jaxrs/RpcGenerator.java

@@ -48,19 +48,18 @@ private void addConstructor() {
 
   private void addHandleMethod(MethodDescriptorProto mdp) {
     ClassName inputType = mapper.get(mdp.getInputType());
-    ClassName outputType = mapper.get(mdp.getOutputType());
     rpcResource.addMethod(MethodSpec.methodBuilder("handle" + mdp.getName())
         .addModifiers(Modifier.PUBLIC)
         .addAnnotation(POST)
         .addAnnotation(AnnotationSpec.builder(PATH)
             .addMember("value", "$S", "/" + mdp.getName())
             .build())
         .addAnnotation(AnnotationSpec.builder(PRODUCES)
-            .addMember("value", "$S", "application/x-protobuf")
+            .addMember("value", "$S", "application/protobuf")
             .addMember("value", "$S", "application/json")
             .build())
         .addAnnotation(AnnotationSpec.builder(CONSUMES)
-            .addMember("value", "$S", "application/x-protobuf")
+            .addMember("value", "$S", "application/protobuf")
             .addMember("value", "$S", "application/json")
             .build())
         .addParameter(inputType, "request")

plugin/src/test/java/com/flit/protoc/gen/server/jaxrs/HelloworldGeneratorTest.test_Generate.approved.txt

@@ -25,11 +25,11 @@ public class RpcHelloWorldResource {
   @POST
   @Path("/Hello")
   @Produces({
-      "application/x-protobuf",
+      "application/protobuf",
       "application/json"
   })
   @Consumes({
-      "application/x-protobuf",
+      "application/protobuf",
       "application/json"
   })
   public Response handleHello(Helloworld.HelloReq request) {
@@ -39,11 +39,11 @@ public class RpcHelloWorldResource {
   @POST
   @Path("/HelloAgain")
   @Produces({
-      "application/x-protobuf",
+      "application/protobuf",
       "application/json"
   })
   @Consumes({
-      "application/x-protobuf",
+      "application/protobuf",
       "application/json"
   })
   public Response handleHelloAgain(Helloworld.HelloReq request) {

plugin/src/test/java/com/flit/protoc/gen/server/jaxrs/StatusGeneratorTest.test_Generate.approved.txt

@@ -23,11 +23,11 @@ public class RpcStatusResource {
   @POST
   @Path("/GetStatus")
   @Produces({
-      "application/x-protobuf",
+      "application/protobuf",
       "application/json"
   })
   @Consumes({
-      "application/x-protobuf",
+      "application/protobuf",
       "application/json"
   })
   public Response handleGetStatus(Core.Empty request) {