updated jackrabbit (fixing security issue, see https://issues.apache.org/jira/browse/JCR-3883)

main/core/pom.xml

@@ -19,7 +19,7 @@
 
 	<properties>
 		<jetty.version>9.2.10.v20150310</jetty.version>
-		<jackrabbit.version>2.9.1</jackrabbit.version>
+		<jackrabbit.version>2.10.1</jackrabbit.version>
 		<commons.transaction.version>1.2</commons.transaction.version>
 		<jta.version>1.1</jta.version>
 	</properties>