Added ability to filter ConstantName by FINAL/NOTFINAL

[EliteMasterEric]

Added the new FINAL and NOTFINAL tokens to the ConstantName rule. This essentially lets you define separate rules for final and non-final constant names.

• Without either of these tokens (or both), the rule acts as it did previously, applying filtering to any static constants, both final and var.
• With FINAL, only final constants will be evaluated, with var constants ignored.
• With NOTFINAL, only var constants will be evaluated, with final constants ignored.

Unit tests included.

[EliteMasterEric]

Oh yeah this resolves #526!