maven-gpg-plugin is not a managed plugin in oss-parent, move it to build.plugins

Author: rfscholte

pom.xml

@@ -183,11 +183,6 @@
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-release-plugin</artifactId>
           <version>3.0.1</version>
-        </plugin>
-		<plugin>
-          <groupId>org.apache.maven.plugins</groupId>
-          <artifactId>maven-gpg-plugin</artifactId>
-          <version>3.1.0</version>
         </plugin>
       </plugins>
     </pluginManagement>
@@ -376,6 +371,11 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-gpg-plugin</artifactId>
+        <version>3.1.0</version>
+      </plugin>
     </plugins>
   </build>