OPAL-2382 - Placed the pricipal validation in SubjectProfileServiceImpl
OPAL-2382 - pass principal to exception
Merge pull request #504 from kazoompa/bug-OPAL-2382

OPAL-2382 - validated the session when getting profile related info
OPAL-2399 Authz info implemented in ApplicationRealm
Showing N/A in contingency table
OPAL-2388: Removed the call to onCrossVariable when a variable is selected for contingency table
OPAL-2387: Added a clear button that clears selected variables and contingency table
OPAL-2378: Formatting error message when variable does not exists and code improvements
Adding copyrights