Change output Vicmap table names to lower case
Add summary field to Towong queries
Use DEPI naming convention for  Vicmap tables
Initialise geometry_columns before Vicmap import

Because we recently changed all table names to lower case, Pozi Connect
is not doing its job in removing the geometry_columns records that refer
to the old mixed case name. We need to force the deletion of these
records in order for the new import to succeed.