Consolidate grpc generation for docs

Author: vietj

vertx-grpc-docs/src/main/java/examples/GrpcClientExamples.java

@@ -1,5 +1,6 @@
 package examples;
 
+import examples.grpc.*;
 import io.grpc.MethodDescriptor;
 import io.vertx.core.Future;
 import io.vertx.core.Vertx;
@@ -13,7 +14,6 @@
 import io.vertx.docgen.Source;
 import io.vertx.grpc.client.*;
 import io.vertx.grpc.common.*;
-import io.vertx.grpc.server.GrpcServer;
 
 import java.util.concurrent.TimeUnit;
 

vertx-grpc-docs/src/main/java/examples/GrpcIoClientExamples.java

@@ -1,5 +1,8 @@
 package examples;
 
+import examples.grpc.GreeterGrpc;
+import examples.grpc.HelloReply;
+import examples.grpc.HelloRequest;
 import io.grpc.stub.StreamObserver;
 import io.vertx.core.Vertx;
 import io.vertx.core.net.SocketAddress;

vertx-grpc-docs/src/main/java/examples/GrpcIoServerExamples.java

@@ -1,5 +1,8 @@
 package examples;
 
+import examples.grpc.GreeterGrpc;
+import examples.grpc.HelloReply;
+import examples.grpc.HelloRequest;
 import io.grpc.stub.StreamObserver;
 import io.vertx.core.Vertx;
 import io.vertx.core.http.HttpServer;

vertx-grpc-docs/src/main/java/examples/GrpcServerExamples.java

@@ -1,5 +1,6 @@
 package examples;
 
+import examples.grpc.*;
 import io.vertx.core.Future;
 import io.vertx.core.Promise;
 import io.vertx.core.Vertx;