lets make it easier to configure some aspects of pipelines via a ConfigMap in Kubernetes/OpenShift

[jstrachan]

e.g. things like which branches are CD release branches versus CI branches/PRs versus developer branches (run tests + re-run apps fast) - see #3

We also should make it easy to enable/disable various features like:

• generate maven site report
• generate changelog report
• run sonarqube
• run baysian reports
• run selenium tests

I'm not sure the perfect approach; do we use the fabric8.yml file to enable/disable those features? Or use a ConfigMap?

Either way we should come up with a standard function to wrap that up so that we can make the pipelines configurable to enable/disable feature flags from a nice UI or CLI tool - without users having to hack groovy source etc

[jstrachan]

I've added a pipelineConfiguration helper method - e.g. like this https://github.com/fabric8io/fabric8-pipeline-library/blob/master/src/io/fabric8/Utils.groovy#L100 isDisabledITests() method