NOBUG: Make isAccessAllowed() public.
PROC-92: Add query parameter to showTextMatrix and showRandomGroups that filters by test names.

/showTestMatrix?test=bgcolortst,example2 only outputs the 'bgcolortst' and
'example2' tests and audit information. Similar for /showRandomGroups.

Add tests for new filter by name methods in Proctor.
Merge branch 'PROC-92-filtermatrix' into 'master'

Add query parameter to showTextMatrix and showRandomGroups that filters by test names