updated test_get_mirrors to use @patch and split into test_get_mirrors_no_cname
updated test_get_mirrors to use @patch and split into test_get_mirrors_no_cname

pypa/pip,benesch/pip,zorosteven/pip,jythontools/pip,prasaianooz/pip,zenlambda/pip,ncoghlan/pip,atdaemon/pip,alquerci/pip,ChristopherHogan/pip,tdsmith/pip,pradyunsg/pip,RonnyPfannschmidt/pip,prasaianooz/pip,ChristopherHogan/pip,zenlambda/pip,techtonik/pip,cjerdonek/pip,alquerci/pip,wkeyword/pip,rouge8/pip,h4ck3rm1k3/pip,yati-sagade/pip,caosmo/pip,jasonkying/pip,nthall/pip,harrisonfeng/pip,haridsv/pip,dstufft/pip,davidovich/pip,haridsv/pip,h4ck3rm1k3/pip,squidsoup/pip,haridsv/pip,xavfernandez/pip,supriyantomaftuh/pip,jmagnusson/pip,davidovich/pip,qbdsoft/pip,KarelJakubec/pip,erikrose/pip,harrisonfeng/pip,James-Firth/pip,Ivoz/pip,supriyantomaftuh/pip,rouge8/pip,sbidoul/pip,pfmoore/pip,habnabit/pip,qbdsoft/pip,habnabit/pip,jamezpolley/pip,pradyunsg/pip,chaoallsome/pip,rbtcollins/pip,sbidoul/pip,pjdelport/pip,jamezpolley/pip,cjerdonek/pip,nthall/pip,nthall/pip,xavfernandez/pip,benesch/pip,dstufft/pip,atdaemon/pip,radiosilence/pip,rbtcollins/pip,zvezdan/pip,ChristopherHogan/pip,fiber-space/pip,fiber-space/pip,ianw/pip,James-Firth/pip,Carreau/pip,mujiansu/pip,yati-sagade/pip,sigmavirus24/pip,wkeyword/pip,qwcode/pip,msabramo/pip,minrk/pip,davidovich/pip,natefoo/pip,jmagnusson/pip,h4ck3rm1k3/pip,yati-sagade/pip,patricklaw/pip,habnabit/pip,sigmavirus24/pip,zorosteven/pip,alex/pip,jasonkying/pip,qbdsoft/pip,zvezdan/pip,natefoo/pip,esc/pip,mujiansu/pip,blarghmatey/pip,willingc/pip,erikrose/pip,natefoo/pip,blarghmatey/pip,jmagnusson/pip,rouge8/pip,caosmo/pip,xavfernandez/pip,esc/pip,jamezpolley/pip,mattrobenolt/pip,RonnyPfannschmidt/pip,zvezdan/pip,mattrobenolt/pip,pjdelport/pip,minrk/pip,squidsoup/pip,dstufft/pip,mindw/pip,Ivoz/pip,luzfcb/pip,chaoallsome/pip,chaoallsome/pip,mindw/pip,mindw/pip,Gabriel439/pip,jythontools/pip,harrisonfeng/pip,willingc/pip,fiber-space/pip,esc/pip,James-Firth/pip,techtonik/pip,alex/pip,tdsmith/pip,Gabriel439/pip,mujiansu/pip,Gabriel439/pip,rbtcollins/pip,blarghmatey/pip,pypa/pip,qwcode/pip,erikrose/pip,msabramo/pip,jasonkying/pip,pfmoore/pip,jythontools/pip,supriyantomaftuh/pip,graingert/pip,RonnyPfannschmidt/pip,ncoghlan/pip,zenlambda/pip,ncoghlan/pip,KarelJakubec/pip,graingert/pip,zorosteven/pip,graingert/pip,Carreau/pip,luzfcb/pip,benesch/pip,luzfcb/pip,prasaianooz/pip,sigmavirus24/pip,techtonik/pip,pjdelport/pip,squidsoup/pip,wkeyword/pip,alex/pip,patricklaw/pip,caosmo/pip,KarelJakubec/pip,willingc/pip,tdsmith/pip,ianw/pip,atdaemon/pip