Fix for Java package 1.46

Mick Killianey provided me with the following patch to the Java package
(version 1.46) which restricts the junit dependency to testing scope.
This will be incorporated in version 1.47.

diff --git a/java/pom.xml b/java/pom.xml
index 65ab122..1a11ff1 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -172,6 +172,7 @@
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.12</version>
+      <scope>test</scope>
     </dependency>
   </dependencies>