Fixes #813 - External usergroups can be linked to an LDAP auth source

Fixes #6786 - Handle error when no taxonomy params get sent

Basically, no organization params are getting sent as the bug reporter is not
using json and not using wrapped params. You can also test this by doing:

curl -X POST http://localhost:3000/api/v2/organizations...

Refs #4478 - API doc strings marked for translation

Fixes #6768 - Hammer set-parameter does not work

fixes #6430 - validate presence of location and organization for managed host if Settings are turned on

fixes #6753 - fix API v1 examples in docs that show error messages by re-ordering functional tests

fixes #6749 - fix API v2 examples in docs that show error messages by re-ordering functional tests

fixes #5178 - unify API parameters and return values. User creation should not require payload wrapped with 'user' root

fixes #4155 - enable host/CR (dis)association via api

Fixes #6532 - permission related api extensions

- usergroups#show lists associated roles
 - listing available resource types
 - filters#show lists associated roles
 - filters#index lists associated roles and permissions and orders the results
 - pagination in permissions#index...