Cleanup Test Dependencies

Fix dependency scopes for test artifacts, removes the following test jars from
asterix binary release:

- hyracks-api-0.2.18-SNAPSHOT-tests.jar
- hyracks-test-support-0.2.18-SNAPSHOT.jar
- mockito-all-2.0.2-beta.jar

Change-Id: Ib8f53ef310b1f6702e1605524f0718340e9178f5
Reviewed-on: https://asterix-gerrit.ics.uci.edu/969
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>
diff --git a/hyracks-fullstack/hyracks/hyracks-util/pom.xml b/hyracks-fullstack/hyracks/hyracks-util/pom.xml
index 5b2c331..7c98990 100644
--- a/hyracks-fullstack/hyracks/hyracks-util/pom.xml
+++ b/hyracks-fullstack/hyracks/hyracks-util/pom.xml
@@ -51,6 +51,7 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
+      <scope>test</scope>
     </dependency>
   </dependencies>