TST: fix intermittent dict_complex test failures
TST: fix intermittent dict_complex test failures

`test_dict_complex` and `test_dict_numpy_complex` would give occasional
test failures on Python 3.4.  The test was written to depend on the
order of values from `dict.values()`; remove that dependency.

Closes gh-7293.

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