Fix for https://bugzilla.52north.org/show_bug.cgi?id=907 - AcceptVersions parameter not handled correctly
Removed version parameter from get capabilities tests, replaced with acceptVersions where appropriate

According to the spec., getcapabilities request do not have a version
parameter. However, they can have a acceptVersions-parameter. If
acceptVersions contains a wrong version an exceptionreport containing
the "VersionNegotiationFailed" exeption code has to be returned.