Django Debug Toolbar updates

- Upgraded packages
- Properly configured the library for devstack

LEARNER-2188

course_discovery/settings/_debug_toolbar.py

+"""
+Debug Toolbar configuration.
+
+These settings may be insecure, and should only be used for local development.
+See http://django-debug-toolbar.readthedocs.io/en/stable/configuration.html for additional settings.
+"""
+DEBUG_TOOLBAR_CONFIG = {
+    'SHOW_TOOLBAR_CALLBACK': (lambda __: True),
+}

course_discovery/settings/devstack.py

+# noinspection PyUnresolvedReferences
+from course_discovery.settings._debug_toolbar import *  # isort:skip
 from course_discovery.settings.production import *
 
 DEBUG = True

course_discovery/settings/local.py

+from course_discovery.settings._debug_toolbar import *  # isort:skip
 from course_discovery.settings.base import *
 
 DEBUG = True

requirements/local.txt

@@ -2,8 +2,8 @@
 -r test.txt
 -r docs.txt
 
-django-debug-toolbar==1.5
-django-elasticsearch-debug-toolbar==1.0.4
+django-debug-toolbar==1.8
+django-elasticsearch-debug-toolbar==1.2.0
 # i18n
 transifex-client==0.12.2
 edx-i18n-tools==0.3.7