Apparently an anonymous class in Groovy is no anonymous in the compiled code,
so we need another heuristic. We now check for non-existence of public
constructors (if there are none then there's no point regsistering that
class with an application context).
[#48718891]
* Added a test for each of the classes loaded by the SpringApplication
* If it's an anonymous class or looks like a Groovy closure we ignore it
* The CLI sample job.groovy also modified to take advantage
[Fixes#48718891]
