Minor fix to scheduler.cpp to ignore REGISTERED and REREGISTERED events when disconnected.
Minor fix to scheduler.cpp to ignore REGISTERED and REREGISTERED
events when disconnected.

chhsia0/mesos,Aman-Jain-14/customizedMesos,verizonlabs/mesos,neilconway/mesos,gsantovena/mesos,reneploetz/mesos,verizonlabs/mesos,chhsia0/mesos,neilconway/mesos,abudnik/mesos,chhsia0/mesos,reneploetz/mesos,Aman-Jain-14/customizedMesos,abudnik/mesos,verizonlabs/mesos,gsantovena/mesos,craimbert/mesos,neilconway/mesos,abudnik/mesos,verizonlabs/mesos,jpeach/mesos,kaysoky/mesos,jpeach/mesos,zmalik/mesos,craimbert/mesos,jpeach/mesos,dforsyth/mesos,neilconway/mesos,kaysoky/mesos,dforsyth/mesos,kaysoky/mesos,Gilbert88/mesos,jpeach/mesos,reneploetz/mesos,reneploetz/mesos,andschwa/mesos,yuquanshan/customizedMesos,yuquanshan/customizedMesos,craimbert/mesos,Aman-Jain-14/customizedMesos,Gilbert88/mesos,yuquanshan/customizedMesos,gsantovena/mesos,chhsia0/mesos,zmalik/mesos,yuquanshan/customizedMesos,zmalik/mesos,jpeach/mesos,craimbert/mesos,Aman-Jain-14/customizedMesos,andschwa/mesos,abudnik/mesos,dforsyth/mesos,asamerh4/mesos,chhsia0/mesos,andschwa/mesos,Aman-Jain-14/customizedMesos,asamerh4/mesos,verizonlabs/mesos,andschwa/mesos,craimbert/mesos,reneploetz/mesos,craimbert/mesos,kaysoky/mesos,Gilbert88/mesos,gsantovena/mesos,andschwa/mesos,asamerh4/mesos,andschwa/mesos,Gilbert88/mesos,verizonlabs/mesos,gsantovena/mesos,asamerh4/mesos,zmalik/mesos,Aman-Jain-14/customizedMesos,dforsyth/mesos,craimbert/mesos,yuquanshan/customizedMesos,asamerh4/mesos,dforsyth/mesos,gsantovena/mesos,kaysoky/mesos,verizonlabs/mesos,neilconway/mesos,kaysoky/mesos,yuquanshan/customizedMesos,gsantovena/mesos,zmalik/mesos,zmalik/mesos,reneploetz/mesos,asamerh4/mesos,kaysoky/mesos,Gilbert88/mesos,asamerh4/mesos,dforsyth/mesos,Aman-Jain-14/customizedMesos,chhsia0/mesos,abudnik/mesos,yuquanshan/customizedMesos,jpeach/mesos,reneploetz/mesos,andschwa/mesos,abudnik/mesos,chhsia0/mesos,jpeach/mesos,Gilbert88/mesos,Gilbert88/mesos,zmalik/mesos,neilconway/mesos,abudnik/mesos,neilconway/mesos,dforsyth/mesos