Added SonarQube to the pipeline.

.gitlab-ci.yml

@@ -2,7 +2,7 @@
 stages:
   - tox
   - documentation
-
+   - analysis
 include:
   - docs/.gitlab-ci.yml
 
@@ -46,3 +46,11 @@ run-tox-pipeline:
   artifacts:
     paths:
       - htmlcov
+
+  sonarqube-analysis:
+     stage: analysis
+    image: sonarsource/sonar-scanner-cli
+    script:
+      - sonar-scanner
+    only:
+      - develop