Bug Description:
	When an entry contains an attribute that is also defined by a cos definition
	a specifier defines which values win: the real values that are in the entry or the
	virtual values that are cos defined.
	The specifier 'default' means that the real values are the winners (returned).
	'operational-default' has the same behavior but just specify that the attribute
	is operational.
	The bug is that when real values exists, the 'operational-default' specifier
	drops the real values in favor of the virtual ones.

Fix Description:
	Change the test, so that real values are not kept for 'operation-default'
	Note: the full routine cos_cache_query_attr looks quite messy and error prone
	It would be nice to rewrite it when we have time

https://pagure.io/389-ds-base/issue/50053

Reviewed by: Mark Reynolds

Platforms tested: F27

Flag Day: no

Doc impact: no