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
Several templates used a variable set by the user (the request host header). This led to a vulnerability where an attacker could inject their domain name into these templates (i.e., activation emails). This patch fixes this vulnerability.
LMS-532
