Change name of online-display/MODULES or online-display/modules

[jrquirk]

On a standard Mac computer, you are not allowed to have two files with the same case-insensitive name. When checking out AlcapDAQ on a Mac, you get an issue where online-display/MODULES is never cloned because there is already a folder named online-display/modules. Mac treats them the same. This is really frustrating. Git breaks because it can never recover a commit, and if you make a commit you're required to either delete MODULES or modules.

[AndrewEdmonds11]

I think we have to keep MODULES because that's what the Alcapana makefile expects.