- fix StrictlyEqualOrDifferentCleanUp to add parentheses when needed
- add new test to CleanUpTest

Change-Id: I62665f66db46dd3e9f737b8ff19a91ff4564818a
Reviewed-on: https://git.eclipse.org/r/c/jdt/eclipse.jdt.ui/+/189564
Tested-by: JDT Bot <jdt-bot@eclipse.org>
Tested-by: Jeff Johnston <jjohnstn@redhat.com>
Reviewed-by: Jeff Johnston <jjohnstn@redhat.com>