Make sure AqStr columns return a string
Make sure AqStr columns return a string

Without the explicit cast the return value could be unicode(). While
this should not matter much, using str() makes the interface more
consistent.

stdweird/aquilon,quattor/aquilon,stdweird/aquilon,quattor/aquilon,guillaume-philippon/aquilon,guillaume-philippon/aquilon,guillaume-philippon/aquilon,stdweird/aquilon,quattor/aquilon