SLING-6460 Update Oak to 1.5.17

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1778570 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 53cee4e..88886fe 100644
--- a/pom.xml
+++ b/pom.xml
@@ -44,7 +44,7 @@
 
   <properties>
     <jackrabbit.version>2.14.0</jackrabbit.version>
-    <oak.version>1.5.15</oak.version>
+    <oak.version>1.5.17</oak.version>
     <org.ops4j.pax.exam.version>4.9.1</org.ops4j.pax.exam.version>
   </properties>