JIT resource creation blocks deployments if a user is
self-managing their cluster, as it will fail the build
if unable to create a namespace and service account.
Using a custom namespace and service account was previously
supported for project level clusters, so we should preserve
this functionality.
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/27352
AFAIK the only relevant place is Projects::CreateService, this gets
called when user creates a new project, forks a new project and does
those things via the api.
Also create k8s namespace for new group hierarchy
when transferring project between groups
Uses new Refresh service to create k8s namespaces
- Ensure we use Cluster#cluster_project
If a project has multiple clusters (EE), using Project#cluster_project
is not guaranteed to return the cluster_project for this cluster. So
switch to using Cluster#cluster_project - at this stage a cluster can
only have 1 cluster_project.
Also, remove rescue so that sidekiq can retry
