Bump karaf from 3.0.5 to 3.0.8

Change-Id: Ic5bc130f5110f4ff9da6ec22d066a5dd3069288d
diff --git a/tools/build/build-offline-karaf b/tools/build/build-offline-karaf
index ea0f7ed..76b0fd1 100755
--- a/tools/build/build-offline-karaf
+++ b/tools/build/build-offline-karaf
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-KARAF_VERSION="3.0.5"
+KARAF_VERSION="3.0.8"
 KARAF_TARFILE_NAME="apache-karaf-${KARAF_VERSION}.tar"
 BOOT_FEATURES="standard,ssh,scr,war,webconsole"