Continued with unit tests:

Continued with unit tests:
- some refacturing: all detectFoo() methods are now moved from configuration
  to bootstrap class as this seems proper place
- also they can only be called static
- DNS resolver is now globally quieted in tests/bootstrap.php
- created new unit test for FrameworkBootstrap class (partly)
- this origins from configuration unit test

Signed-off-by: Roland Häder <roland@mxchange.org>