WL-163-added-the-USD-symbol-himBHin-the-HTML-templates-configuration-settings

added the unit tests for the default currency settings
Merge pull request #6068 from edx/muhhshoaib/WL-163

The USD symbol $ is hard coded into the HTML templates
fix broken master regarding pep8 number of blank lines
Merge pull request #6089 from edx/cdodge/pep8-fixes

fix broken master regarding pep8 number of blank lines
If feature flag is enabled, replace the old login/registration pages with the new combined login/registration page.
Add support for external auth on the combined login/registration page

Add support for redirect URLs in third party auth for combined login/registration page

Remove old login/registration acceptance tests

Add deprecation warnings to old login and register views

Move third party auth util to student_account

Add exception for microsites