Explicitly declare jMolecules DDD dependency.

Fixes GH-2156.

Author: odrotbohm

spring-data-jdbc/pom.xml

@@ -193,6 +193,13 @@
 			</exclusions>
 		</dependency>
 
+		<dependency>
+			<groupId>org.jmolecules</groupId>
+			<artifactId>jmolecules-ddd</artifactId>
+			<version>${jmolecules}</version>
+			<scope>test</scope>
+		</dependency>
+
 		<dependency>
 			<groupId>org.jmolecules.integrations</groupId>
 			<artifactId>jmolecules-spring</artifactId>