Bump karaf from 3.0.5 to 3.0.8

Change-Id: Ic5bc130f5110f4ff9da6ec22d066a5dd3069288d
diff --git a/tools/dev/bin/onos-setup-ubuntu-devenv b/tools/dev/bin/onos-setup-ubuntu-devenv
index 86895c6..688850a 100755
--- a/tools/dev/bin/onos-setup-ubuntu-devenv
+++ b/tools/dev/bin/onos-setup-ubuntu-devenv
@@ -14,7 +14,7 @@
 
 cd; mkdir Downloads Applications
 cd Downloads
-KARAF_VERSION=${KARAF_VERSION:-3.0.5}
+KARAF_VERSION=${KARAF_VERSION:-3.0.8}
 wget https://downloads.onosproject.org/third-party/apache-karaf-$KARAF_VERSION.tar.gz
 wget http://archive.apache.org/dist/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.tar.gz
 tar -zxvf apache-karaf-$KARAF_VERSION.tar.gz -C ../Applications/