Fixed `delete` usage in authorization_test.cpp.
Fixed `delete` usage in authorization_test.cpp.

Additionally this review fixes some minor
formatting and typo issues.

Review: https://reviews.apache.org/r/49575/

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