test attribute order roundtrip only if OrderedDict is available (python >= 2.7)
test attribute order roundtrip only if OrderedDict is available (python >= 2.7)

lucius-feng/xmltodict,martinblech/xmltodict,pombredanne/xmltodict,pombredanne/xmltodict,martinblech/xmltodict,bzamecnik/xmltodict,CyberTailor/iBlock,sporgj/xmltodict,ahlusar1989/xmltodict,solvebio/xmltodict,butson/xmltodict,haiyangd/xmltodict,CyberTailor/iBlock