Remove RZLogHelper in favor of project-specific macro

RZLogHelper included in the project as a whole was interfering with the use of RZLogHelper in RZDataManager. Nothing preventing compilation, but the log verbosity settings for the project were overriding or disabling logging in RZDataManager.

To prevent that, I removed log helper in favor of a data manager-specific set of logging macros.

RZLogHelper is also derived from another library, so we should also probably rewrite it as our own.