fixes #1888 - set value to default if zero or less

• idle_timeout
• entries_per_page
• puppet_interval

auto create admin-user when missing in API requests

add getter for admin user User.admin which auto creates admin when missing

shortened fixture name so tests pass on postgresql which doesn't truncate extra string characters

fixes #1892 - auto generate provisioning tokens based on build state

Use tokens for discovery of host identity during installation

- fixes #1069
- fixes #1720
- refs #969

fixes #832 - adds parameterized class support

Credits:
This patch is based on the original work of Olivier Favre
<olivier@yakaz.com> many many thanks!

• import class parameters, and try to understand their types
• support a complex matrix of environments, puppet classes and their...

trying to fix/figure out travis complains

fixes #1843 - Accepts a plain hash as facts source

Subnets API

remove the extra requires 'ap' as it breaks travis