TST: remove usages of np.full_like for numpy<1.8.0 compat
TST: remove usages of np.full_like for numpy<1.8.0 compat

closes ##14276

Author: Joe Jevnik <joe@quantopian.com>

Closes #14277 from llllllllll/no-full-like and squashes the following commits:

e098fd7 [Joe Jevnik] TST: remove usages of np.full_like for numpy<1.8.0 compat

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