Updated the document link of 'Image Provisioning Design'.
Updated the document link of 'Image Provisioning Design'.

Review: https://reviews.apache.org/r/52395/

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