Feature/rdlint

This PR adds support for running Crichton lint command `rdlint`.  If the command fails, the CI run will fail.
If there is no api_descriptors directory in the project, the command will not be run.

Ad-hoc tested.

@miwest929 @jcarres-mdsol @asmith-mdsol 
The `rdlint` binary should be available if the `crichton` gem is available.  If the resource descriptor is not in the `api_descriptors` directory, then `rdlint` will not find it unless a parameter is passed to it which does not seem feasible here.  My concern also was that if there is an application that is using crichton in some way but is not using a resource descriptor, then it should not try to lint anything.