Bump karaf from 3.0.5 to 3.0.8

Change-Id: Ic5bc130f5110f4ff9da6ec22d066a5dd3069288d
diff --git a/features/features.xml b/features/features.xml
index 5e32db7..6eabccb 100644
--- a/features/features.xml
+++ b/features/features.xml
@@ -16,7 +16,7 @@
   -->
 <features xmlns="http://karaf.apache.org/xmlns/features/v1.2.0"
           name="onos-@FEATURE-VERSION">
-    <repository>mvn:org.apache.karaf.features/standard/3.0.5/xml/features</repository>
+    <repository>mvn:org.apache.karaf.features/standard/3.0.8/xml/features</repository>
 
     <feature name="onos-thirdparty-base" version="@FEATURE-VERSION"
              description="ONOS 3rd party dependencies">