[user] Create contrail user/conf/log dir on all nodes

Analytics compute and control nodes can be installed on another node
than config (api*) node, so we must install contrail user and logs.
https://github.com/Juniper/contrail-controller/wiki/Roles-Daemons-Ports

Change-Id: I58faf3f4c76b2eb2077552036a239b60103ee965