Upgrade Pax Exam to 4.13.0
diff --git a/parent/pom.xml b/parent/pom.xml
index 67ccd20..d329371 100644
--- a/parent/pom.xml
+++ b/parent/pom.xml
@@ -41,7 +41,7 @@
         <log4j.version>1.2.6</log4j.version>
         <hawtdispatch.version>1.21</hawtdispatch.version>
         <hawtbuf.version>1.11</hawtbuf.version>
-        <exam.version>4.12.0</exam.version>
+        <exam.version>4.13.0</exam.version>
         <cxf.resources.base.path />
         <cxf.checkstyle.extension />
     </properties>