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

common/djangoapps/util/request.py

@@ -1,5 +1,6 @@
 """ Utility functions related to HTTP requests """
 from django.conf import settings
+from microsite_configuration.middleware import MicrositeConfiguration
 
 
 def safe_get_host(request):
@@ -14,4 +15,4 @@ def safe_get_host(request):
     if isinstance(settings.ALLOWED_HOSTS, (list, tuple)) and '*' not in settings.ALLOWED_HOSTS:
         return request.get_host()
     else:
-        return settings.SITE_NAME
+        return MicrositeConfiguration.get_microsite_configuration_value('site_domain', settings.SITE_NAME)