WebSearch: unit test disabling for CFG_CERN_SITE

* Disables non-applicable unit test (because of different
  index setup) when running on CFG_CERN_SITE.

Reviewed-by: Tibor Simko <tibor.simko@cern.ch>
Merge branch 'maint-1.1'

* maint-1.1:
  WebSearch: unit test disabling for CFG_CERN_SITE