e2e: Support any cluster type

[nirs]

There are some cluster details that are now hard coded (e.g. clusterset name). We ned to make all values part of the config so one can create a config that works with any cluster (e.g. OpenShift test cluster).

Tasks:

• Move all hard coded values to config
  • clusterset name
  • other?
• Consider splitting the config to cluster (clusterset, ...) and repo properties (url, branch, path)
• Create configuration for our openshift test clusters so developers do not need to start from scratch
• Create configuration for QE test clusters if possible, so tester do not have to start from scratch
• Test on all cluster types