Fix acceptance tests

Updating lettuce tests.

Revert the deletion of the original edx header and footer.

Renaming old header and footers to legacy files.

Add IS_EDX_DOMAIN flag for header.

Updating tests and django main template.

renaming the header files for microsite backwards compat.

For microsites, since we don't have a footer override yet for django templates, remove the footer all together

LMS-11226

LMS-6622

This code adds the ability to add Mako template lookup directories on
the fly, allowing third party add-ons to contribute their own Mako templates.
A new API function for registering Mako templates is introduced::

    from edxmako import add_lookup

    add_lookup('main', '/path/to/templates')

    # Or, specify a package to lookup using pkg_resources.  This will
    # add the 'templates' directory inside the current package:
    add_lookup('main', 'templates', package=__name__)

catch additional FEATURE['ENABLE_MKTG_SITE'] checks and make sure MicrositeConfigurations will override the global setting

one more faulty login regarding ENABLE_MKTG_SITE=true situations

Introduction of the Microsite feature which allows for limited multi-tenant branding on a subdomain basis, e.g. foo.edx.org and bar.edx.org

fix errorenous logic when running a microsite that could reside in a hosting environment with a marketing site in front of it

pep8/pylint fixes

address PR feedback, remove underscore from test hostname

more pep8/pylint cleanup. Skip test_microsites test, it works on localdev, not on Jenkins. Need to talk with QA team

manually add Ned's single-to-double quote fix

change aws.py runtimes so that the microsite_dir that is read from configuration is changed to a python path

Conflicts:
	lms/templates/help_modal.html

If mitxmako.middleware has ever been imported, then render_to_string
works correctly (which is why we didn't see this in the rest of
edx-platform). However, if it hasn't (like in a celery worker), then
using mitxmako.middleware errors out.

[LMS-1085]

Move mitxmako initialization to a startup module, called by lms.startup and cms.startup for both management commands and when run via wsgi

[DEVPAIN-7]

Themes do not necessarily want all of the available LMS routes, such
as `/jobs` and `/university_profiles`. This change splits up the
`lms/urls.py` file and selectively enables/disables routes based on
whether or not a theme is enabled. This is a naive solution for now;
a better solution gives themes a way to selectively overrides such
routes.

Additionally, with the `MKTG_URL_LINK_MAP` setting that hits certain
routes immediately on each page render (whenever the `marketing_link`
helper function is called), themes may crash if they don't leave
all marketing link routes present in `lms/urls.py`. This change also
provides the ability to override the `MKTG_URL_LINK_MAP` in the
settings.

Finally, modify the mitxmako marketing URL middleware to not try to
reverse disabled URLs, which are those keys in the map whose values
are `None`.

* Fix indentation/line break issues
* Handle marketing root URL as a separate case in marketing_link
* Move link map to its own setting.

Pep8 fixes

and use it for the new marketing site links.