JERSEY-624: up version of Google Appengine (1.9.59).

Change-Id: Ifcf9e554752ae4c56d0be29d7ed76963c7bda7b2

Author: tomas-langer

pom.xml

@@ -1847,7 +1847,7 @@
         <findbugs.glassfish.version>1.3</findbugs.glassfish.version>
         <findbugs.version>3.0.2</findbugs.version>
         <freemarker.version>2.3.23</freemarker.version>
-        <gae.version>1.8.4</gae.version>
+        <gae.version>1.9.59</gae.version>
         <gpg.mvn.plugin.version>1.6</gpg.mvn.plugin.version>
         <grizzly.client.version>1.13</grizzly.client.version>
         <grizzly2.version>2.4.0</grizzly2.version>