Set the log level to ERROR when two or more quiet flags are passed
Set the log level to ERROR when two or more quiet flags are passed

Fixes pypa/pip#2670

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