Check for "unidentifed nominuses" in input files

Refs #3683.
Fixing buggy input files found while working on #3683.

There is a new (improved) error message to check for when parsing
checked_pointer_param_test.i
Merge pull request #3697 from jwpeterson/parser_nominus

Add extra input file checking to Parser
Merge commit '44f28ae6944b40931de68992f6d7e2d4ccc743a7'