Corrections to population of spatial_unit_group for wards and further tidy up of database creation bat file

Nigerian UPI is based on codes for State, LGA and Ward and does not include blanks
To correct entries for Kano Fagge and Ungogo LGAs and wards within systematic registration areas
the name field has been modified so as to comply with the UPI conventions.
Removed remaining lines for Samoa test data loading (.7 extraction)