Issue #395: Potential failure to look up UIMA-internal classes in OSGI-like contexts

[reckart]

What's in the PR

• When trying to load a UIMA JCas class, fall back to using the UIMA framework classloader instead of the resource manager parent classloader which might not import all UIMA packages

How to test manually

• E.g. construct a situation where the parent classloader of a resource manager has no access to the UIMA JCas classes such as TOP.

Automatic testing

• PR adds/updates unit tests

Documentation

• PR adds/updates documentation

Organizational

• PR adds/updates dependencies.
  _{^{Only dependencies under approved licenses are allowed. LICENSE and NOTICE files in the respective modules where dependencies have been added as well as in the project root have been updated.}}