Bug: Bulk Upload category

With the fix that for a personal category always the id of the contributor is taken, it now does not work to put a video in a non personal category, it is always the personal contributor category a video is uploaded to.



It’s on:

contributor exists:
	—> category id from contributor's personal category
contributor does not exist:
	—> category id of randomly selected category



Target state:

	subject = e-mail-address:
		e-mail-address exists only once (for users with status = 1):
			—> category id of the user with this e-mail-address
		e-mail-address exists more than once (for users with status = 1):
			contributor exists:
				contributor has this e-mail-address:
					—> category id from contributor's personal category
				contributor has a different e-mail-address:
					—> e-mail-address that is used if an contributor does not exist (must be adaptable)
			contributor does not exist:
				—> category id that is used if category does not exist (must be adaptable)

	subject = non personal category:
		category name exists:
			—> category id of this category
		category name does not exist:
			—> category id that is used if category does not exist (must be adaptable)