Fix hamcrest tests wrap pom.xml.

Change-Id: I891ddca22c1446f65c3613f34f367233789f3d2c
diff --git a/containers/org.eclipse.linuxtools.docker.tests.hamcrest-wrap/pom.xml b/containers/org.eclipse.linuxtools.docker.tests.hamcrest-wrap/pom.xml
index 2512463..d15933d 100644
--- a/containers/org.eclipse.linuxtools.docker.tests.hamcrest-wrap/pom.xml
+++ b/containers/org.eclipse.linuxtools.docker.tests.hamcrest-wrap/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>org.eclipse.linuxtools</groupId>
 		<artifactId>org.eclipse.linuxtools.docker</artifactId>
-		<version>2.3.1</version>
+		<version>2.3.0</version>
 	</parent>
 	<artifactId>org.eclipse.linuxtools.docker.tests.hamcrest-wrap</artifactId>
 	<version>1.2.0-SNAPSHOT</version>