Add sources to Maven release

Author: eolivelli

pom.xml

@@ -430,39 +430,6 @@ limitations under the License.]]></inlineHeader>
           </additionalSourceDirectories>
         </configuration>
       </plugin>
-      <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>build-helper-maven-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>add-integration-test-sources</id>
-            <phase>generate-test-sources</phase>
-            <goals>
-              <goal>add-test-source</goal>
-            </goals>
-            <configuration>
-              <sources>
-                <source>src/it/java</source>
-              </sources>
-            </configuration>
-          </execution>
-          <execution>
-            <id>add-integration-test-resources</id>
-            <phase>generate-test-resources</phase>
-            <goals>
-              <goal>add-test-resource</goal>
-            </goals>
-            <configuration>
-              <resources>
-                <resource>
-                  <filtering>false</filtering>
-                  <directory>src/it/resources</directory>
-                </resource>
-              </resources>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
       <plugin>
         <groupId>com.mycila</groupId>
         <artifactId>license-maven-plugin</artifactId>
@@ -630,6 +597,19 @@ limitations under the License.]]></inlineHeader>
               </execution>
             </executions>
           </plugin>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-source-plugin</artifactId>
+            <version>3.2.1</version>
+            <executions>
+              <execution>
+                <goals>
+                  <goal>jar-no-fork</goal>
+                </goals>
+                <phase>package</phase>
+              </execution>
+            </executions>
+          </plugin>
           <plugin>
             <artifactId>maven-gpg-plugin</artifactId>
             <executions>