Allow passwords to be set on user accounts

Change-Id: Iabacff50d628cc2d128ce4eee38aca66878b8a98
use apt module for repos, pins and keys

Change-Id: Id8f7e9b52caffd49509c7ca7b8e153ef89f675e1
use double quotes to allow variables to resolve

Change-Id: I4dbe26e5a18b6015369cd703ddc9634e76dd7ea4
re-add nectars prefs due to apt module bug

Change-Id: Iad06a3c58752535b312ce857af42d307d4376915