Added authorization tests when trying to attach to a container input.
Added authorization tests when trying to attach to a container input.

Introduced a test where a principal is allowed to launch a container
session, but not to attach to its input, therefore its attempts should
fail.

Review: https://reviews.apache.org/r/54784/

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