BitsTypeObject changed the name of the value getter -- it is now
values(), not getValue(). Adjust UnionTemplate reference and update
tests to covert this case.
JIRA: MDSAL-797
Change-Id: I8b8789b87ae5ea43eaa942b932690dc3e35a161e Signed-off-by: Robert Varga <robert.varga@pantheon.tech>