4 Verify build nodes named in YAML files against config files.
5 Extend lf-jjb-verify anchor with boolean configuration variable
6 check-build-node-labels that guards a conditional build step.
7 If true, run script jjb-verify-build-nodes.sh to check build-node
8 labels in YAML files within the jjb subdirectory against labels
9 defined by config files in the jenkins cloud configuration
10 directory. Disabled by default. Projects should enable and
11 configure the job; e.g., for external build node labels.