Updated some UI modules to use api's for dependent entities
updated arch tests to use api to create OS

corrected indentation for few template tests

Updated all usergroup tests to use fauxfactory and blocked tests with bz-id

updated subnet tests to create domain using api

Updated OS tests to use apis to create partition_table, config_templates, arch, OS and media

updated all media tests to use media URL from Constants

using media URL from Constants for location tests

Removed single value dict from test data

clubbed two negative create domain tests in one

clubbed two negative create config_group tests in one

clubbed two negative compute resource tests in one
RepositorySet-API: Added the functionality to enable RedHat Repos.

Added `list_rhproducts` function to list all the RedHat Products
in a given Organization.

RH Products have varying Id's depending upon various other custom
products, hence we use the product name which is a static value
to fetch the RH Product's ID in `fetch_rhproduct_id` function.

RH Reposets too have varying ID's hence we use reposet name which
is a static value to fetch the RH Reposet's ID in `fetch_reposet_id`
functio.

Also RH Repositories first need to be enabled , so that they can be
synced.
`enable_repo` and `disable_repo` functions requires the
`reposet_id`, `basearch` and `releasever` to enable, disable the
repositories.

Updated the functions to use search and params.

The `fetch_rhproduct_id` now uses search to fetch the `prd_id`.
Also this function uses `escape_search` function while searching.

The `fetch_rhreposet_id` now specifies the name of
the reposet to fetch the `reposet_id` information.

Added functionality to fetch the repo_id and updated docstrings.

Added `fetch_repoid` function to fetch the RedHat repo_id.

Updated the docstrings for the `path` functions in `Organization`
and `Products` class.

Some minor fixes related to docstrings and sphinx.

Fixed many miscellaneous issues