Changes to externalize all endppoints, db credentials and sql statements

aws-blog-event-driven-batch-analytics/src/main/resources/edba_lambda_config.properties

@@ -7,6 +7,6 @@ sql.retrieveOpenSteps=select job_config_id, substr(last_exec_stepid,1,locate(':'
 sql.auditValidatedFile=insert into edbaconfig.ingestedfilestatus (file_url, submitted_jobs,last_update_status, last_validated_timestamp) VALUES(?,null,?,current_timestamp) ON DUPLICATE KEY UPDATE  last_update_status = ? , submitted_jobs=null,last_validated_timestamp=current_timestamp
 edba.cluster.tag.key=edba
 edba.cluster.tag.value=true  
-url=jdbc:mysql://edbaconfig.ceizmegioajd.us-east-1.rds.amazonaws.com:3306/edbaconfig
+url=jdbc:mysql://<<MYSQL_END_POINT>>:3306/<<MYSQL_DB>>
 user=<<MySQL_USER_NAME>>
 password=<<MySQL_PASSWORD>>