Add support for Jupyter in GitLab via Kubernetes

app/assets/javascripts/clusters/clusters_bundle.js

app/assets/javascripts/clusters/components/applications.vue

app/assets/javascripts/clusters/constants.js

app/assets/javascripts/clusters/services/clusters_service.js

app/assets/javascripts/clusters/stores/clusters_store.js

app/assets/stylesheets/pages/clusters.scss

app/controllers/projects/clusters/applications_controller.rb

app/models/clusters/applications/jupyter.rb

app/models/clusters/cluster.rb

app/serializers/cluster_application_entity.rb

app/services/clusters/applications/install_service.rb

app/views/projects/clusters/show.html.haml

...te/20180511131058_create_clusters_applications_jupyter.rb

db/schema.rb

spec/factories/clusters/applications/helm.rb

spec/fixtures/api/schemas/cluster_status.json

spec/models/clusters/cluster_spec.rb

vendor/jupyter/values.yaml