Fix lower_email and lower_nickname on newly created Account entities.
Fix lower_email and lower_nickname on newly created Account entities.

Review URL: https://codereview.appspot.com/103880045/

openlabs/cr.openlabs.co.in,rietveld-codereview/rietveld,salomon1184/rietveld,foolonhill/rietveld,rietveld-codereview/rietveld,supriyantomaftuh/rietveld,foolonhill/rietveld,xtypebee/rietveld,Koulio/rietveld,andyzsf/rietveld,gco/rietveld,fuzan/rietveld,Koulio/rietveld,DeanHere/rietveld,fuzan/rietveld,v3ss0n/rietveld,dushmis/rietveld,aungzanbaw/rietveld,ericmckean/rietveld,aungzanbaw/rietveld,draem0507/rietveld,robfig/rietveld,openlabs/cr.openlabs.co.in,v3ss0n/rietveld,rietveld-codereview/rietveld,robfig/rietveld,Koulio/rietveld,gavioto/rietveld,berkus/rietveld,xtypebee/rietveld,sajingeo/rietveld,gavioto/rietveld,draem0507/rietveld,xtypebee/rietveld,DeanHere/rietveld,sajingeo/rietveld,robfig/rietveld,arg0/rietveld,v3ss0n/rietveld,salomon1184/rietveld,arg0/rietveld,andyzsf/rietveld,dushmis/rietveld,fuzan/rietveld,gavioto/rietveld,openlabs/cr.openlabs.co.in,supriyantomaftuh/rietveld,foolonhill/rietveld,gco/rietveld,andyzsf/rietveld,ericmckean/rietveld,salomon1184/rietveld,google-code-export/rietveld,arg0/rietveld,berkus/rietveld,google-code-export/rietveld,DeanHere/rietveld,rietveld-codereview/rietveld,aungzanbaw/rietveld,google-code-export/rietveld,berkus/rietveld,supriyantomaftuh/rietveld,gco/rietveld,dushmis/rietveld,ericmckean/rietveld,sajingeo/rietveld,draem0507/rietveld