Use OFFSET/FETCH syntax in H2 dialect.

As per suggestion of the H2 maintainer.

Closes #1287
Original pull request #1297

spring-data-relational/src/main/java/org/springframework/data/relational/core/dialect/H2Dialect.java

@@ -56,7 +56,7 @@ public class H2Dialect extends AbstractDialect {
 
 		@Override
 		public String getLimitOffset(long limit, long offset) {
-			return String.format("LIMIT %d OFFSET %d", limit, offset);
+			return String.format("OFFSET %d ROWS FETCH FIRST %d ROWS ONLY", offset, limit);
 		}
 
 		@Override