TST: Added regression test empty percentile, in ref to #6530 and #6553
TST: Added regression test empty percentile, in ref to #6530 and #6553

MSeifert04/numpy,jonathanunderwood/numpy,dwillmer/numpy,SiccarPoint/numpy,b-carter/numpy,madphysicist/numpy,rgommers/numpy,jorisvandenbossche/numpy,utke1/numpy,mwiebe/numpy,bringingheavendown/numpy,numpy/numpy,grlee77/numpy,anntzer/numpy,skwbc/numpy,jakirkham/numpy,Eric89GXL/numpy,mattip/numpy,ESSS/numpy,WillieMaddox/numpy,joferkington/numpy,pbrod/numpy,shoyer/numpy,endolith/numpy,pbrod/numpy,anntzer/numpy,jakirkham/numpy,mhvk/numpy,behzadnouri/numpy,abalkin/numpy,pizzathief/numpy,jakirkham/numpy,skwbc/numpy,Eric89GXL/numpy,simongibbons/numpy,madphysicist/numpy,njase/numpy,argriffing/numpy,utke1/numpy,njase/numpy,jorisvandenbossche/numpy,endolith/numpy,shoyer/numpy,rherault-insa/numpy,chatcannon/numpy,gmcastil/numpy,mwiebe/numpy,gfyoung/numpy,WillieMaddox/numpy,tacaswell/numpy,WarrenWeckesser/numpy,pizzathief/numpy,chatcannon/numpy,simongibbons/numpy,joferkington/numpy,chiffa/numpy,b-carter/numpy,utke1/numpy,rgommers/numpy,AustereCuriosity/numpy,drasmuss/numpy,ahaldane/numpy,pyparallel/numpy,SiccarPoint/numpy,gfyoung/numpy,WarrenWeckesser/numpy,bertrand-l/numpy,grlee77/numpy,behzadnouri/numpy,charris/numpy,grlee77/numpy,numpy/numpy,mhvk/numpy,nbeaver/numpy,AustereCuriosity/numpy,ahaldane/numpy,solarjoe/numpy,drasmuss/numpy,SiccarPoint/numpy,mattip/numpy,WarrenWeckesser/numpy,stuarteberg/numpy,pdebuyl/numpy,jonathanunderwood/numpy,ssanderson/numpy,MSeifert04/numpy,Eric89GXL/numpy,ViralLeadership/numpy,gfyoung/numpy,charris/numpy,maniteja123/numpy,mwiebe/numpy,AustereCuriosity/numpy,b-carter/numpy,pbrod/numpy,kiwifb/numpy,ahaldane/numpy,mattip/numpy,WarrenWeckesser/numpy,mhvk/numpy,jonathanunderwood/numpy,numpy/numpy,tynn/numpy,madphysicist/numpy,rgommers/numpy,ContinuumIO/numpy,stuarteberg/numpy,ahaldane/numpy,simongibbons/numpy,seberg/numpy,gmcastil/numpy,bringingheavendown/numpy,seberg/numpy,solarjoe/numpy,chiffa/numpy,pdebuyl/numpy,behzadnouri/numpy,SiccarPoint/numpy,ESSS/numpy,Eric89GXL/numpy,ContinuumIO/numpy,Dapid/numpy,ddasilva/numpy,tynn/numpy,ssanderson/numpy,dwillmer/numpy,rherault-insa/numpy,pbrod/numpy,MSeifert04/numpy,ESSS/numpy,stuarteberg/numpy,jakirkham/numpy,bringingheavendown/numpy,gmcastil/numpy,charris/numpy,MSeifert04/numpy,jorisvandenbossche/numpy,simongibbons/numpy,ViralLeadership/numpy,kiwifb/numpy,dwillmer/numpy,jorisvandenbossche/numpy,tacaswell/numpy,joferkington/numpy,charris/numpy,WarrenWeckesser/numpy,pdebuyl/numpy,grlee77/numpy,ddasilva/numpy,anntzer/numpy,mhvk/numpy,pyparallel/numpy,ContinuumIO/numpy,shoyer/numpy,pizzathief/numpy,maniteja123/numpy,pizzathief/numpy,tacaswell/numpy,nbeaver/numpy,ssanderson/numpy,bertrand-l/numpy,argriffing/numpy,seberg/numpy,solarjoe/numpy,mattip/numpy,pyparallel/numpy,ddasilva/numpy,dwillmer/numpy,nbeaver/numpy,abalkin/numpy,jakirkham/numpy,kiwifb/numpy,simongibbons/numpy,madphysicist/numpy,abalkin/numpy,WillieMaddox/numpy,drasmuss/numpy,madphysicist/numpy,njase/numpy,ViralLeadership/numpy,mhvk/numpy,MSeifert04/numpy,shoyer/numpy,Dapid/numpy,seberg/numpy,joferkington/numpy,pizzathief/numpy,pdebuyl/numpy,ahaldane/numpy,skwbc/numpy,numpy/numpy,endolith/numpy,chatcannon/numpy,rherault-insa/numpy,maniteja123/numpy,bertrand-l/numpy,stuarteberg/numpy,endolith/numpy,rgommers/numpy,pbrod/numpy,tynn/numpy,Dapid/numpy,shoyer/numpy,anntzer/numpy,chiffa/numpy,jorisvandenbossche/numpy,grlee77/numpy,argriffing/numpy