minor changes to batch jobs code

mifosng-db/migrations/core_db/V80__schedule_jobs_tables_updates.sql

@@ -0,0 +1,20 @@
+RENAME TABLE `scheduled_jobs` TO `job`;
+RENAME TABLE `scheduled_job_runhistory` TO `job_run_history`;
+
+ALTER TABLE `job`
+	ALTER `job_name` DROP DEFAULT,
+	ALTER `job_display_name` DROP DEFAULT;
+ALTER TABLE `job`
+	CHANGE COLUMN `job_name` `name` VARCHAR(50) NOT NULL,
+	CHANGE COLUMN `job_display_name` `display_name` VARCHAR(50) NOT NULL;
+
+ALTER TABLE `job`
+	CHANGE COLUMN `job_initializing_errorlog` `initializing_errorlog` TEXT NULL;
+
+
+ALTER TABLE `job_run_history`
+	ALTER `triggertype` DROP DEFAULT;
+ALTER TABLE `job_run_history`
+	CHANGE COLUMN `errormessage` `error_message` VARCHAR(500) NULL DEFAULT NULL,
+	CHANGE COLUMN `triggertype` `trigger_type` VARCHAR(25) NOT NULL,
+	CHANGE COLUMN `errorlog` `error_log` TEXT NULL;