INT-1195: rename correlation->group in MessageGroup and friends

spring-integration-jdbc/src/main/sql/schema.sql.vpp

@@ -9,11 +9,11 @@ CREATE TABLE INT_MESSAGE  (
 
 CREATE TABLE INT_MESSAGE_GROUP  (
 	MESSAGE_ID ${VARCHAR}(100) NOT NULL,
-	CORRELATION_KEY ${VARCHAR}(100) NOT NULL,
+	GROUP_KEY ${VARCHAR}(100) NOT NULL,
 	REGION ${VARCHAR}(100),
 	MARKED ${BIGINT},
 	CREATED_DATE ${TIMESTAMP} NOT NULL,
 	UPDATED_DATE ${TIMESTAMP},
 	MESSAGE_BYTES ${BLOB},
-	constraint MESSAGE_GROUP_PK primary key (MESSAGE_ID, CORRELATION_KEY)
+	constraint MESSAGE_GROUP_PK primary key (MESSAGE_ID, GROUP_KEY)
 );