Upgrade CXF to 3.3.8
diff --git a/pom.xml b/pom.xml
index e8d01ad..1c8add2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -147,7 +147,7 @@
 
     <tomcat.version>9.0.40</tomcat.version>
 
-    <cxf.version>3.3.7</cxf.version>
+    <cxf.version>3.3.8</cxf.version>
     <ehcache.version>2.10.3</ehcache.version>
     <!-- used by cxf for security (replay attack) -->
     <jetty.version>7.5.3.v20111011</jetty.version>