Merge branch '14-modify-the-way-the-status-of-a-service-in-inventory-is-determined-when-a-supporting-resource' into 'develop'

Resolve "Modify the way the status of a Service in inventory is determined when a supporting resource changes status"

See merge request !9

Fixed Unit tests for TMF API

See merge request !8

Merge branch '12-create-a-pipeline-to-build-and-publish-the-docker-image-in-gitlab-registry' into 'develop'

Resolve "Create a pipeline to build and publish the docker image in gitlab registry"

See merge request !7

Merge branch 'develop' into '12-create-a-pipeline-to-build-and-publish-the-docker-image-in-gitlab-registry'

# Conflicts:
#   .gitlab-ci.yml