Combine xlsx tests with xls to avoid code duplication
Combine xlsx tests with xls to avoid code duplication

Winand/pandas,winklerand/pandas,GuessWhoSamFoo/pandas,pandas-dev/pandas,rs2/pandas,cbertinato/pandas,winklerand/pandas,kdebrab/pandas,cbertinato/pandas,winklerand/pandas,louispotok/pandas,TomAugspurger/pandas,toobaz/pandas,kdebrab/pandas,gfyoung/pandas,dsm054/pandas,cbertinato/pandas,DGrady/pandas,amolkahat/pandas,jorisvandenbossche/pandas,jmmease/pandas,rs2/pandas,pandas-dev/pandas,nmartensen/pandas,winklerand/pandas,harisbal/pandas,Winand/pandas,jorisvandenbossche/pandas,DGrady/pandas,amolkahat/pandas,zfrenchee/pandas,MJuddBooth/pandas,jreback/pandas,nmartensen/pandas,Winand/pandas,harisbal/pandas,cython-testbed/pandas,gfyoung/pandas,zfrenchee/pandas,jmmease/pandas,toobaz/pandas,rs2/pandas,jorisvandenbossche/pandas,TomAugspurger/pandas,pratapvardhan/pandas,datapythonista/pandas,cython-testbed/pandas,pratapvardhan/pandas,GuessWhoSamFoo/pandas,jreback/pandas,linebp/pandas,cython-testbed/pandas,zfrenchee/pandas,jreback/pandas,datapythonista/pandas,linebp/pandas,cbertinato/pandas,nmartensen/pandas,linebp/pandas,zfrenchee/pandas,pratapvardhan/pandas,harisbal/pandas,louispotok/pandas,winklerand/pandas,winklerand/pandas,toobaz/pandas,nmartensen/pandas,kdebrab/pandas,gfyoung/pandas,harisbal/pandas,dsm054/pandas,DGrady/pandas,MJuddBooth/pandas,amolkahat/pandas,datapythonista/pandas,pratapvardhan/pandas,linebp/pandas,GuessWhoSamFoo/pandas,dsm054/pandas,kdebrab/pandas,gfyoung/pandas,pratapvardhan/pandas,zfrenchee/pandas,dsm054/pandas,linebp/pandas,pandas-dev/pandas,Winand/pandas,cbertinato/pandas,dsm054/pandas,datapythonista/pandas,GuessWhoSamFoo/pandas,cython-testbed/pandas,DGrady/pandas,toobaz/pandas,rs2/pandas,GuessWhoSamFoo/pandas,jmmease/pandas,TomAugspurger/pandas,jorisvandenbossche/pandas,gfyoung/pandas,louispotok/pandas,jmmease/pandas,jreback/pandas,nmartensen/pandas,Winand/pandas,DGrady/pandas,MJuddBooth/pandas,MJuddBooth/pandas,jmmease/pandas,louispotok/pandas,cython-testbed/pandas,DGrady/pandas,Winand/pandas,TomAugspurger/pandas,louispotok/pandas,amolkahat/pandas,MJuddBooth/pandas,pandas-dev/pandas,nmartensen/pandas,toobaz/pandas,amolkahat/pandas,linebp/pandas,jreback/pandas,kdebrab/pandas,jmmease/pandas,harisbal/pandas