Update configuration.md

Using FQDN in the "Two connections" example, to make it clear.
cs-fix
Merge pull request #286 from UFOMelkor/cs-fixes

cs-fix
Merge pull request #284 from liorch88/patch-1

Update configuration.md to use FQDN for classes
Correcting empty_option behavior - null value should not be overridden
Forced failing unit test for #247
slightly more calisthenic test adn dockblock fix
Fix CS for travis ?
remove closure
assert is not relevant anymore as empty_option=>null should not display anything
added attribute for tests
ensure tests for empty_options