Added an .xml file containing pass_tests for the swe_dam_break_2d test case.
Added an .xml file containing pass_tests for the swe_dam_break_2d test case.

jjo31/ATHAM-Fluidity,jrper/fluidity,iakovos-panourgias/fluidity,jjo31/ATHAM-Fluidity,rjferrier/fluidity,rjferrier/fluidity,iakovos-panourgias/fluidity,rjferrier/fluidity,iakovos-panourgias/fluidity,jrper/fluidity,iakovos-panourgias/fluidity,jjo31/ATHAM-Fluidity,iakovos-panourgias/fluidity,jjo31/ATHAM-Fluidity,rjferrier/fluidity,rjferrier/fluidity,jjo31/ATHAM-Fluidity,jrper/fluidity,jrper/fluidity,jrper/fluidity