refactor AuthorizationManager code for Evaluations
PLFM-1969: ACLs for Submissions; PLFM-2015: READ_PRIVATE_SUBMISSION permission
code review changes
code review change, part II
Merge pull request #563 from bkng/plfm1969

PLFM-1969: ACLs for Submissions; PLFM-2015: READ_PRIVATE_SUBMISSION permission