TokenTypes assumes singularity, which can create confusion, as we
have multiple multiple distinct sets. This separates out
Lithium-specific tokens into their own class.
JIRA: CONTROLLER-1919
Change-Id: Id8c47be7c432b44980dbeac8ef41d430c64e5490 Signed-off-by: Robert Varga <robert.varga@pantheon.tech>