adjusts over write default for importing dashboard

Author: jbat

lib/superset/dashboard/export.rb

@@ -13,7 +13,7 @@ module Dashboard
     class Export < Request
       include FileUtilities
 
-      TMP_SUPERSET_DASHBOARD_PATH = '/tmp/superset_dashboards'
+      TMP_SUPERSET_DASHBOARD_PATH = '/tmp/superset_dashboard_exports'
 
       attr_reader :dashboard_id, :destination_path
 

lib/superset/dashboard/import.rb

@@ -11,9 +11,10 @@
 #             Subsequent imports will result in updating/over writing the previous imported dashboard with the contents of the zip file.
 
 # the overwrite flag will determine if the dashboard will be updated or created new
+# overwrite: false .. will result in an error if a dashboard with the same UUID already exists
 
 # Usage
-# Superset::Dashboard::Import.new(source_zip_file: '/tmp/dashboard.zip', overwrite: true).perform
+# Superset::Dashboard::Import.new(source_zip_file: '/tmp/dashboard.zip').perform
 #
 
 module Superset
@@ -22,7 +23,7 @@ class Import < Request
 
       attr_reader :source_zip_file, :overwrite
 
-      def initialize(source_zip_file: , overwrite: false)
+      def initialize(source_zip_file: , overwrite: true)
         @source_zip_file = source_zip_file
         @overwrite = overwrite
       end