Upgrade commons-compress v1.18

Fixes 2 security issues and brings the common property
value to the root pom.xml for easier management.

Issue-ID: POLICY-1063
Change-Id: I56e3318bdfae2d205c61a5ad7af70a79bd70dada
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>
diff --git a/POLICY-SDK-APP/pom.xml b/POLICY-SDK-APP/pom.xml
index 9252114..182ed41 100644
--- a/POLICY-SDK-APP/pom.xml
+++ b/POLICY-SDK-APP/pom.xml
@@ -237,7 +237,7 @@
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-compress</artifactId>
-            <version>1.8</version>
+            <version>${commons.compress.version}</version>
         </dependency>
         <dependency>
             <groupId>args4j</groupId>