Add qa stage

.gitlab-ci.yml

 stages:
 - verify
 - release
+- qa
 
 default:
   # Default image
@@ -40,4 +41,9 @@ release:
     paths:
       - target/*.zip
   only:
-    - /^release-[.0-9]+$/
\ No newline at end of file
+    - /^release-[.0-9]+$/
+
+qa:
+  stage: qa
+  script:
+    - mvn $MAVEN_CLI_OPTS sonar:sonar -Dsonar.login=${SONAR_TOKEN} -Dsonar.branch.name=${CI_COMMIT_REF_NAME}

pom.xml

@@ -53,6 +53,8 @@
     <orekit.compiler.source>1.8</orekit.compiler.source>
     <orekit.compiler.target>1.8</orekit.compiler.target>
     <orekit.implementation.build>${git.revision}; ${maven.build.timestamp}</orekit.implementation.build>
+    <!-- sonar related properties -->
+    <sonar.host.url>https://sonar.orekit.org/</sonar.host.url>
   </properties>
 
   <developers>