Add <scope>test</scope> to the JUnit dependency

JUnit is only needed at test-time, not at runtime. That way it will
avoid packaging it into the p2 repo.

Signed-off-by: Alexandre Montplaisir <alexmonthy@efficios.com>

ctf/pom.xml

@@ -25,6 +25,7 @@
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>RELEASE</version>
+      <scope>test</scope>
     </dependency>
   </dependencies>