case sensitiv

stmt = conn.prepareStatement(sql, new String[]{"ID"}) this line makes case sensitive issues, an exception saying 'ID' does not exist while using the postgreSQL.

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/GroupDAOImpl.java

@@ -47,7 +47,7 @@ public class GroupDAOImpl implements GroupDAO {
         try {
             Connection conn = GroupManagementDAOFactory.getConnection();
             String sql = "INSERT INTO DM_GROUP(DESCRIPTION, GROUP_NAME, OWNER, TENANT_ID) VALUES (?, ?, ?, ?)";
-            stmt = conn.prepareStatement(sql, new String[]{"ID"});
+            stmt = conn.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS);
             stmt.setString(1, deviceGroup.getDescription());
             stmt.setString(2, deviceGroup.getName());
             stmt.setString(3, deviceGroup.getOwner());