beta: get rid of [Database-Group] lucene section

The Database-Group let you finely tune which indexes you are going to
have a on a search box. In beta we really do not care about it since we
have only ONE search box.

Solves bug 45908

Change-Id: I954c02830b2b37f8c56ce6dcbeb564819d209682
europium added

Change-Id: I22ce3d2a47dc800f8c89af54727eae9f55518ac3
Merge "europium added" into production
Merge "beta: get rid of [Database-Group] lucene section" into production