Testing normalization:
'Owner Name' => 'OWNER_NAME' [OK]
'Owner  Name' => 'OWNER_NAME' [OK]
'Owner-Name' => 'OWNER_NAME' [OK]
'Owner_Name' => 'OWNER_NAME' [OK]
'PLOT NO' => 'PLOT_NO' [OK]
'PLOT #' => 'PLOT' [OK]
'  LGA  ' => 'LGA' [OK]
'Town Name (Required)' => 'TOWN_NAME_REQUIRED' [OK]

Testing mapping:
'Owner's Name' -> 'OWNER_S_NAME' -> 'owner_name'
'Plot #' -> 'PLOT' -> 'plot_number'
'Region' -> 'REGION' -> 'lga_name'
'Site Name' -> 'SITE_NAME' -> 'layout_name'
'Layout Name' -> 'LAYOUT_NAME' -> 'layout_name'