Update pip and setuptools in requirements txt

Versions selected to be pre-19 pip
due to unresolved issues with the build systems

Upgrade everything, party on

document new process

rotate license files

fix Swagger schema generation target

Remove --ignore-installed flag

awx/settings/defaults.py

@@ -310,6 +310,9 @@ REST_FRAMEWORK = {
     'VIEW_DESCRIPTION_FUNCTION': 'awx.api.generics.get_view_description',
     'NON_FIELD_ERRORS_KEY': '__all__',
     'DEFAULT_VERSION': 'v2',
+    # For swagger schema generation
+    # see https://github.com/encode/django-rest-framework/pull/6532
+    'DEFAULT_SCHEMA_CLASS': 'rest_framework.schemas.AutoSchema',
     #'URL_FORMAT_OVERRIDE': None,
 }