Upgrade to apache karaf 4.2.9

Change-Id: Id42b0b0893ee81cb54a50bf6c76da024a9a2d2a8
diff --git a/tools/build/bazel/osgi_features.bzl b/tools/build/bazel/osgi_features.bzl
index 90366aa..a156189 100644
--- a/tools/build/bazel/osgi_features.bzl
+++ b/tools/build/bazel/osgi_features.bzl
@@ -102,7 +102,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <features xmlns="http://karaf.apache.org/xmlns/features/v1.2.0"
           name="onos-%s">
-    <repository>mvn:org.apache.karaf.features/standard/4.2.8/xml/features</repository>
+    <repository>mvn:org.apache.karaf.features/standard/4.2.9/xml/features</repository>
 ''' % ONOS_VERSION
 
 FEATURES_FOOTER = "</features>"