fix testexhibit_should_allow_two_content_items_adding

fix Test_Eukaryotic_Cells_Description
Merge branch 'master' of https://github.com/alterm4nn/ChronoZoom
included test for searching
Revert "included test for searching"

This reverts commit 2767853d365256355365e243a265ae3227bec947.
Merge pull request #767 from a-chumagin/master

	fix testexhibit_should_allow_two_content_items_adding