Merge branch '4852-migration-specs-fail-locally-if-no-geo-db-is-configured' into 'master'

Make resetting column information overridable in EE

See merge request gitlab-org/gitlab-ce!17007

spec/support/migrations_helpers.rb

@@ -25,14 +25,19 @@ module MigrationsHelpers
     clear_schema_cache!
 
     # Reset column information for the most offending classes **after** we
-    # migrated the schema up, otherwise, column information could be outdated
-    ActiveRecord::Base.descendants.each { |klass| klass.reset_column_information }
+    # migrated the schema up, otherwise, column information could be
+    # outdated. We have a separate method for this so we can override it in EE.
+    ActiveRecord::Base.descendants.each(&method(:reset_column_information))
 
     # Without that, we get errors because of missing attributes, e.g.
     # super: no superclass method `elasticsearch_indexing' for #<ApplicationSetting:0x00007f85628508d8>
     ApplicationSetting.define_attribute_methods
   end
 
+  def reset_column_information(klass)
+    klass.reset_column_information
+  end
+
   def previous_migration
     migrations.each_cons(2) do |previous, migration|
       break previous if migration.name == described_class.name