INTEG-250: [Unified Search] Default value of hideFacetsFilter is true an...

...d it can not be changed by configuration

Problem Analysis
	- Search Setting for anonymous user is not consistent between not login after server starts from scratch and login then logout.
	- No way to set initial parameters of Unified Search

Fix description
	- Correct the conditions in order to check if  user session is anonymous
	- Provide a method to initial parameters of Unified Search