Fix admin's login in seeds.rb
Fix admin's login in seeds.rb

Was using 'full_name' to generate the login instead of using the login specified.

lfzawacki/mconf-web,mconf-rnp/mconf-web,mconftec/mconf-web-santacasa,mconf/mconf-web,mconftec/mconf-web-mytruecloud,mconftec/mconf-web-santacasa,mconf-rnp/mconf-web,amreis/mconf-web,becueb/MconfWeb,lfzawacki/mconf-web,becueb/MconfWeb,lfzawacki/mconf-web,mconf-ufrgs/mconf-web,mconftec/mconf-web-uergs,mconf-ufrgs/mconf-web,fbottin/mconf-web,becueb/MconfWeb,mconf-rnp/mconf-web,amreis/mconf-web,mconftec/mconf-web-mytruecloud,mconftec/mconf-web-cedia,mconftec/mconf-web-uergs,mconf-ufrgs/mconf-web,mconftec/mconf-web-uergs,mconf/mconf-web,mconftec/mconf-web-ufpe,akratech/Akraconference,mconf/mconf-web,mconf-rnp/mconf-web,fbottin/mconf-web,amreis/mconf-web,mconftec/mconf-web-santacasa,lfzawacki/mconf-web,mconftec/mconf-web-mytruecloud,mconftec/mconf-web-cedia,mconftec/mconf-web-uergs,akratech/Akraconference,fbottin/mconf-web,mconftec/mconf-web-ufpe,mconftec/mconf-web-cedia,fbottin/mconf-web,becueb/MconfWeb,mconftec/mconf-web-ufpe,akratech/Akraconference,mconf/mconf-web,mconftec/mconf-web-mytruecloud,amreis/mconf-web,akratech/Akraconference,mconftec/mconf-web-santacasa,mconf-ufrgs/mconf-web,mconftec/mconf-web-ufpe