Allow attributes to be mapped to URL's
    
    Do not split attribute mappings for URL attributes and filters in SP
    configuation page. This allows compatibility with Service Providers
    like Amazon AWS.
    
    Add test code for URL attribute mapping.
    
    Fix formatting of testmapping.py.
    
    Merges: #129
    Signed-off-by: Dan Theisen <daniel.theisen@foresee.com>
    Reviewed-by: Patrick Uiterwijk <puiterwijk@redhat.com>