Added more tests for pickling Prefetches with QuerySets.
Added more tests for pickling Prefetches with QuerySets.

wkschwartz/django,etos/django,piquadrat/django,frankvdp/django,tomchristie/django,claudep/django,MarkusH/django,EmadMokhtar/Django,etos/django,adamchainz/django,mitya57/django,mjtamlyn/django,whs/django,dfunckt/django,solarissmoke/django,atul-bhouraskar/django,piquadrat/django,bak1an/django,phalt/django,auready/django,fenginx/django,auvipy/django,dfdx2/django,monetate/django,intgr/django,yewang15215/django,fenginx/django,treyhunner/django,monetate/django,apollo13/django,dracos/django,mojeto/django,mojeto/django,auvipy/django,schinckel/django,mlavin/django,claudep/django,treyhunner/django,alimony/django,theo-l/django,arun6582/django,blighj/django,rsalmaso/django,bak1an/django,shacker/django,camilonova/django,intgr/django,blighj/django,dracos/django,mjtamlyn/django,ebar0n/django,yewang15215/django,denys-duchier/django,treyhunner/django,manhhomienbienthuy/django,uranusjr/django,pauloxnet/django,whs/django,taaviteska/django,django/django,simonw/django,dfunckt/django,labcodes/django,apollo13/django,claudep/django,tysonclugg/django,MarkusH/django,MarkusH/django,avneesh91/django,timgraham/django,etos/django,Beauhurst/django,sarthakmeh03/django,alexallah/django,labcodes/django,evansd/django,georgemarshall/django,koordinates/django,alimony/django,shaib/django,kaedroho/django,reinout/django,savoirfairelinux/django,pauloxnet/django,mitya57/django,solarissmoke/django,elky/django,mattseymour/django,takis/django,uranusjr/django,elena/django,frishberg/django,rlugojr/django,twz915/django,darjeeling/django,felixxm/django,georgemarshall/django,pauloxnet/django,reinout/django,elky/django,frankvdp/django,ghickman/django,tysonclugg/django,georgemarshall/django,frishberg/django,simonw/django,camilonova/django,ifduyue/django,harisibrahimkv/django,darjeeling/django,erikr/django,mitya57/django,sjlehtin/django,dracos/django,jpic/django,reinout/django,solarissmoke/django,ghickman/django,wkschwartz/django,kaedroho/django,etos/django,timgraham/django,sarthakmeh03/django,theo-l/django,rsalmaso/django,claudep/django,zsiciarz/django,mlavin/django,charettes/django,tomchristie/django,dsanders11/django,adamchainz/django,adamchainz/django,freakboy3742/django,tomchristie/django,MoritzS/django,MarkusH/django,tysonclugg/django,monetate/django,bak1an/django,twz915/django,googleinterns/django,Beauhurst/django,MoritzS/django,blighj/django,googleinterns/django,auready/django,pauloxnet/django,takis/django,frishberg/django,apollo13/django,mattseymour/django,charettes/django,felixxm/django,jpic/django,Beauhurst/django,harisibrahimkv/django,kaedroho/django,elena/django,atul-bhouraskar/django,yewang15215/django,piquadrat/django,koordinates/django,apollo13/django,auvipy/django,twz915/django,mjtamlyn/django,rlugojr/django,ghedsouza/django,mlavin/django,tysonclugg/django,simonw/django,ghedsouza/django,shaib/django,auvipy/django,georgemarshall/django,erikr/django,intgr/django,shacker/django,phalt/django,freakboy3742/django,evansd/django,takis/django,kosz85/django,sjlehtin/django,whs/django,mojeto/django,shacker/django,blighj/django,auready/django,auready/django,alexallah/django,darjeeling/django,EmadMokhtar/Django,rlugojr/django,MoritzS/django,rsalmaso/django,elky/django,mlavin/django,dfdx2/django,avneesh91/django,mattseymour/django,charettes/django,shaib/django,ghedsouza/django,zsiciarz/django,shaib/django,alimony/django,sarthakmeh03/django,taaviteska/django,evansd/django,fenginx/django,whs/django,taaviteska/django,twz915/django,koordinates/django,MoritzS/django,frankvdp/django,rlugojr/django,elena/django,googleinterns/django,jpic/django,django/django,dfdx2/django,savoirfairelinux/django,labcodes/django,sjlehtin/django,alexallah/django,ghickman/django,felixxm/django,kosz85/django,atul-bhouraskar/django,googleinterns/django,uranusjr/django,edmorley/django,EmadMokhtar/Django,manhhomienbienthuy/django,yewang15215/django,kosz85/django,manhhomienbienthuy/django,camilonova/django,django/django,arun6582/django,treyhunner/django,taaviteska/django,denys-duchier/django,ghedsouza/django,theo-l/django,mojeto/django,rsalmaso/django,phalt/django,sjlehtin/django,piquadrat/django,darjeeling/django,avneesh91/django,sarthakmeh03/django,monetate/django,dsanders11/django,schinckel/django,Beauhurst/django,solarissmoke/django,labcodes/django,ifduyue/django,mjtamlyn/django,timgraham/django,savoirfairelinux/django,felixxm/django,dfdx2/django,ifduyue/django,harisibrahimkv/django,intgr/django,shacker/django,erikr/django,django/django,zsiciarz/django,tomchristie/django,edmorley/django,edmorley/django,kosz85/django,ebar0n/django,mitya57/django,timgraham/django,dsanders11/django,avneesh91/django,schinckel/django,mattseymour/django,koordinates/django,simonw/django,ebar0n/django,camilonova/django,fenginx/django,adamchainz/django,manhhomienbienthuy/django,reinout/django,zsiciarz/django,atul-bhouraskar/django,bak1an/django,frankvdp/django,edmorley/django,ifduyue/django,ghickman/django,theo-l/django,elky/django,savoirfairelinux/django,uranusjr/django,alimony/django,elena/django,takis/django,dracos/django,dsanders11/django,erikr/django,schinckel/django,wkschwartz/django,jpic/django,denys-duchier/django,evansd/django,denys-duchier/django,charettes/django,arun6582/django,ebar0n/django,phalt/django,wkschwartz/django,freakboy3742/django,dfunckt/django,harisibrahimkv/django,dfunckt/django,frishberg/django,arun6582/django,alexallah/django