Add indexing to mysql

features/device-mgt/org.wso2.carbon.device.mgt.server.feature/src/main/resources/dbscripts/cdm/mysql.sql

@@ -96,6 +96,9 @@ CREATE TABLE IF NOT EXISTS DM_ENROLMENT_OP_MAPPING (
     CREATED_TIMESTAMP INTEGER NOT NULL,
     UPDATED_TIMESTAMP INTEGER NOT NULL,
     PRIMARY KEY (ID),
+    KEY `fk_dm_device_operation_mapping_operation` (`OPERATION_ID`),
+    KEY `IDX_DM_ENROLMENT_OP_MAPPING` (`ENROLMENT_ID`,`OPERATION_ID`),
+    KEY `ID_DM_ENROLMENT_OP_MAPPING_UPDATED_TIMESTAMP` (`UPDATED_TIMESTAMP`),
     CONSTRAINT fk_dm_device_operation_mapping_device FOREIGN KEY (ENROLMENT_ID) REFERENCES
     DM_ENROLMENT (ID) ON DELETE NO ACTION ON UPDATE NO ACTION,
     CONSTRAINT fk_dm_device_operation_mapping_operation FOREIGN KEY (OPERATION_ID) REFERENCES