Fixed the path to 'mesos-master' in configuration.md.
Fixed the path to 'mesos-master' in configuration.md.

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