There is a group called "kolabtest" with an email "v-kolabtest@muenchen.de"
User creates a new email and enter the string "v-kolab" in the send to field. In this case the autocomplete function lists only the string "kolab".
We expect that only contacts with the string "v-kolab" should be displayed.
Another example,: User is searching for the email address "v-kolabtest@muenchen.de" using the #contactsearchbox. Result: No contact found.
We expect that at least the Group with the email address should be found.