Update to latest App Engine SDK.

Author: tswast

pom.xml

@@ -30,7 +30,7 @@
     </parent>
 
     <properties>
-        <appengine.sdk.version>1.9.36</appengine.sdk.version>
+        <appengine.sdk.version>1.9.37</appengine.sdk.version>
         <appengine.app.version>1</appengine.app.version>
         <project.http.version>1.19.0</project.http.version>
         <project.oauth.version>1.19.0</project.oauth.version>