added dns_id, dhcp_id, tft_ip attributes even though they are nested as children to be consistent with current api

fixes #1907 - audit log should contain puppet class assignments within a hostgroup

minor API v1 fixes

• fix unknown variable name
• enable apipie params validation
• update config_template api doc

typo on index.json.rabl for environments.

added missing s char

Rails cache returns incorrect value for false values.

while this is fixed in Rails 3.1.4, a work around is required for now:

Settings getter method correctly returns false instead of nil.

fixes #1028 - show and override puppet class parameters in the host form.

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