BUG-5775: oxlang - check if browser language is equal shops default language, if not - do not remove language parameter from given URL
BUG-5775: added unit test
Revert "BUG-5775: added unit test"

This reverts commit 813b53b6918830e1529c14b8b0e6cd1a952dabc9.
BUG-5775: added unit test without code formatting the whole file
BUG-5775: removed debug stuff
BUG-5775: shrink line length
BUG-5775: code optimization and force default language german so it passes checks on different configured oxid installations
BUG-5775: shrink line-length to less than 120 characters to match convention
BUG-5775: fixed ISO-8859-1 charset
BUG-5775: charset ISO-8859-1 restore
Merge pull request #163 from boesing/bug-5775

0005775: DefaultLanguage collabs language selection in frontend