Fixed tests based on search(datatables dependent)

The table id of the results displayed is sometimes "list" and sometimes "datatable".
This can be seen here - http://127.0.0.1:8000/eden/org/organisation and http://127.0.0.1:8000/eden/hrm/staff/search
This was breaking some of the tests like SendItem and AddStaffToOrganisation.

So, it is better to find the element using class name(which remains same) rather than searching on the basis of id.

Also, a fix for the broken test CreateProject is also provided.