Allow scopes to exclude certain methods / classes

[JonasKunz]

Scopes allow to select specific methods from classes ast the moment.
E.g. it is easily possible to define scope for all classes implementing a certain interface.

It is however very difficult to exclude certain methods / classes at the moment. For example if you want to instrument all classes implementing an interface except for one class.

To solve this, we should add an exclude option to scopes:

inspectit:
  instrumentation:
    scopes:
       scope_a:
         ...
       scope_b:
         exclude:
           scope_a: true
         ...

In this example scope_b would not instrument the methods matched by scope_a.

It is important that the configuration validation ensures that there are no cycles in the exclude-definitions.