Added region identifier element to the base schema and related changes

JdbcFeatureStoreConstants
-Added bunch of constants for region and group based queries
-UID to FEATURE_NAME
-ENABLE to FATURE_VALUE
FeatureStoreSpringJdbc
- Modified column names
-Added region identifier logic all over
-Read, create, delete, check if exists and update operations addition for region
 
Feature
-Added region identifier
-Added constructor for region based initialization 
 
AbstractStoreTest
-changed tests according to store changes
AssertFf4j
--changed tests according to store changes
FeatureXmlParser
-Added region identifier and fixed feature xml defect
FeatureJsonMarshaller
-         Added marshall and unmarshall logic for region identifier
 
ParameterUtils
-         Fixed some sev1 sonar violation
JdbcFeatureStore
- Modified column names
-Added region identifier logic all over
-Read, create, delete, check if exists and update operations addition for region

MongoDB changes:
-modified object mapper and builder and store classes to incorporate region identifier changes