refs #3283 - add scanner limited to defined resourcePackages

[frantuma]

As mentioned in #3283, since version 2.0.7 default resource scanning behaviour has changed in scenarios where no resource packages or classes are defined; in versions up to 2.0.6 no resources would have been added except the ones defined in custom Application.classes(); since 2.0.7 the whole classpath is instead scanned.

This PR adds a scanner implementation JaxrsApplicationAndResourcePackagesAnnotationScanner which behaves as pre 2.0.7 default mechanism

[vivekmalhotragithub]

How do we use this new Scanner? Is there an example usage?

[frantuma]

@vivekmalhotragithub programmatic usage is e.g. in this test, otherwise you can configure it via configuration providing full class name io.swagger.v3.jaxrs2.integration.JaxrsApplicationAndResourcePackagesAnnotationScanner