CC-2016: Rearrange python scripts for reusability

-fix passing env variables properly when using sudo

python_apps/pypo/install/pypo-daemontools-liquidsoap.sh

@@ -7,9 +7,6 @@ ls_param="/opt/pypo/bin/scripts/ls_script.liq"
 echo "*** Daemontools: starting liquidsoap"
 exec 2>&1
 
-PYTHONPATH=${api_client_path}:$PYTHONPATH
-export PYTHONPATH
-
 cd /opt/pypo/bin/scripts
-sudo -u ${ls_user} ${ls_path} ${ls_param}
+sudo PYTHONPATH=${api_client_path} -u ${ls_user} ${ls_path} ${ls_param}
 # EOF