models: cleaned up User

refs #16029
models: cleaned up District

refs #16029
models: cleaned up School

refs #16029
models: cleaned up Site

refs #16029
models: cleaned up SiteDetail

refs #16029
models: cleaned up Course

refs #16029
models: cleaned up CourseDetail

refs #16029
pep8: User

refs #16029
pep8: District

refs #16029
pep8: School

refs #16029
pep8: Site

refs #16029
pep8: SiteDetail

refs #16029
pep8: Course

refs #16029
pep8: CourseDetail

refs #16029
pep8: sites_courses

refs #16029
Merge branch 'bug/16029' into develop
config: moving to a folder structure

allowing for multiple configs

refs #16017
config: cleanup the default dist

refs #16017
ignore: new configs

refs #16017
app_factory: now using an app factory

refs #16017