deploy: Fix setup of admin user

The group-add and user-modify snf-manage commands are available only
in Astakos node. Therefore we cannot run them on Admin node if
snf-admin-app runs on a different node that snf-astakos-app.

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
deploy: Fix Admin component

In case we test the deployment with local packages we have
to install snf-cyclades-app, snf-astakos-app, and
python-astakosclient manually.

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>