BAEL-10877 Fix build of micronaut project

- Version upgraded, now using the standard maven central
- API changes per the new library in ConcreteGreetingClient and GreetingClient

micronaut/pom.xml

@@ -7,15 +7,10 @@
   
   <properties>
     <exec.mainClass>com.baeldung.micronaut.helloworld.server.ServerApplication</exec.mainClass>
-    <micronaut.version>1.0.0.M2</micronaut.version>
-    <jdk.version>9</jdk.version>
+    <micronaut.version>1.0.0.RC2</micronaut.version>
+    <jdk.version>1.8</jdk.version>
   </properties>
-  <repositories>
-        <repository>
-          <id>jcenter.bintray.com</id>
-          <url>http://jcenter.bintray.com</url>
-        </repository>
-    </repositories>
+
   <dependencyManagement>
     <dependencies>
       <dependency>

micronaut/src/main/java/com/baeldung/micronaut/helloworld/client/ConcreteGreetingClient.java

@@ -1,7 +1,7 @@
 package com.baeldung.micronaut.helloworld.client;
 
 import io.micronaut.http.HttpRequest;
-import io.micronaut.http.client.Client;
+import io.micronaut.http.client.annotation.Client;
 import io.micronaut.http.client.RxHttpClient;
 import io.reactivex.Single;
 

micronaut/src/main/java/com/baeldung/micronaut/helloworld/client/GreetingClient.java

@@ -1,10 +1,7 @@
 package com.baeldung.micronaut.helloworld.client;
 
 import io.micronaut.http.annotation.Get;
-import io.micronaut.http.client.Client;
-import io.micronaut.http.client.RxHttpClient;
-
-import javax.inject.Inject;
+import io.micronaut.http.client.annotation.Client;
 
 @Client("/greet")
 public interface GreetingClient {