Bump karaf from 3.0.5 to 3.0.8

Change-Id: Ic5bc130f5110f4ff9da6ec22d066a5dd3069288d
diff --git a/tools/package/onos-prep-karaf b/tools/package/onos-prep-karaf
index 6d33273..8e83fdf 100755
--- a/tools/package/onos-prep-karaf
+++ b/tools/package/onos-prep-karaf
@@ -10,7 +10,7 @@
 ONOS_VERSION=$3
 BRANDING=$4
 #FIXME karaf version
-KARAF_VERSION="3.0.5"
+KARAF_VERSION="3.0.8"
 
 PREFIX="onos-$ONOS_VERSION"