CI: Adding building of the test images and deploy without testing

ci-scripts/Dockerfile.private.amf-client.ubuntu18.04

ci-scripts/Dockerfile.private.amf-server.ubuntu18.04

ci-scripts/Dockerfile.private.ubuntu18.04

ci-scripts/Dockerfile.private.udm-server.ubuntu18.04

ci-scripts/Jenkinsfile-GitLab-Docker

src/test/amf/amf-api-server.cpp

src/test/amf_client/amf-client.cpp

src/test/udm/udm-api-server.cpp