added essential flag to transactions in schema

share/ddl/PostgreSQL/deploy/24/001-auto-__VERSION.sql

@@ -0,0 +1,18 @@
+-- 
+-- Created by SQL::Translator::Producer::PostgreSQL
+-- Created on Thu Mar  1 13:11:22 2018
+-- 
+;
+--
+-- Table: dbix_class_deploymenthandler_versions
+--
+CREATE TABLE "dbix_class_deploymenthandler_versions" (
+  "id" serial NOT NULL,
+  "version" character varying(50) NOT NULL,
+  "ddl" text,
+  "upgrade_sql" text,
+  PRIMARY KEY ("id"),
+  CONSTRAINT "dbix_class_deploymenthandler_versions_version" UNIQUE ("version")
+);
+
+;