testRemoteSLDMultipleStyles() This test ensures that when a SLD parameter has been passed that refers
to a SLD document with multiple styles, the required one is choosed based
on the LAYER parameter.
This test ensures that when a SLD parameter has been passed that refers
to a SLD document with multiple styles, the required one is choosed based
on the LAYER parameter.
This is the case where a remote SLD document is used in "library" mode.