Kubernetes v2 label based load balancing

[lwander]

• Support enable/disable atomic operations in clouddriver
• Support enable/disable stages w/o dynamic target selection in orca
• Add ad-hoc enable/disable support to clusters tab @danielpeach
• Fix rendering of disabled server groups in UI (this is a backend issue, the load balancers are sticky, and the server groups don't turn grey)
• Support dynamic target selection for manifests in orca
• Add enable/disable stages to pipeline editor @danielpeach
• Guard against operations that attempt to edit labels on deployments

[lwander]

Found a bug where all pods can get disabled in a cluster

[spinnakerbot]

This issue hasn't been updated in 45 days, so we are tagging it as 'stale'. If you want to remove this label, comment:

@spinnakerbot remove-label stale

[lwander]

This is implemented & ready for 1.11