Generate Java code from GPB

This adds module for generating Java code from
Google Protocol Buffers files

Change-Id: Ie7d71ad0fb18854d98f50688c00034cc1699f0b4
Issue-ID: DCAEGEN2-1097
Signed-off-by: Filip Krzywka <filip.krzywka@nokia.com>
diff --git a/pom.xml b/pom.xml
index b52d203..fe2684e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -36,6 +36,8 @@
     <slf4j.version>1.7.25</slf4j.version>
     <logback.version>1.2.3</logback.version>
     <mockito.version>2.23.4</mockito.version>
+    <protobuf.version>3.6.1</protobuf.version>
+    <protoc-jar-maven-plugin.version>3.6.0.2</protoc-jar-maven-plugin.version>
   </properties>
 
   <modules>
@@ -80,6 +82,16 @@
           <artifactId>maven-project-info-reports-plugin</artifactId>
           <version>2.9</version>
         </plugin>
+        <plugin>
+          <groupId>org.codehaus.mojo</groupId>
+          <artifactId>build-helper-maven-plugin</artifactId>
+          <version>1.7</version>
+        </plugin>
+        <plugin>
+          <groupId>com.github.os72</groupId>
+          <artifactId>protoc-jar-maven-plugin</artifactId>
+          <version>${protoc-jar-maven-plugin.version}</version>
+        </plugin>
       </plugins>
     </pluginManagement>
     <plugins>
@@ -157,6 +169,11 @@
         <artifactId>spring-boot-starter-web</artifactId>
         <version>${spring.boot.version}</version>
       </dependency>
+      <dependency>
+        <groupId>com.google.protobuf</groupId>
+        <artifactId>protobuf-java</artifactId>
+        <version>${protobuf.version}</version>
+      </dependency>
 
       <dependency>
         <groupId>org.immutables</groupId>