Added trigger_jenkins_build job to the pipeline.

.gitlab-ci.yml

 ---
 stages:
-  - tox
-  - documentation
-  - sonarqube
+#  - tox
+#  - documentation
+#  - sonarqube
+  - trigger_jenkins_build
 include:
   - docs/.gitlab-ci.yml
 
@@ -55,3 +56,19 @@ sonarqube:
     - sonar-scanner -Dsonar.login=$SONAR_TOKEN -Dproject.settings=./sonar.properties
   tags:
     - docker-executor
+
+trigger_jenkins_build:
+  stage: trigger_jenkins_build
+  image: alpine:latest
+  before_script:
+    - apk add --no-cache curl jq
+  variables:
+    PROJECT_NAME: 'geant-service-orchestrator'
+  script:
+    - 'curl "https://test-swd-release-service01.geant.org/job/build-python-snapshot/buildWithParameters" \
+            --user $JENKINS_USERNAME:$JENKINS_API_TOKEN \
+            --data "PROJECT=${PROJECT_NAME}"'
+#  only:
+#    - develop
+  tags:
+    - docker-executor