Django-cloud-deploy

- Fix a bug for failing to deploy to GAE

- Not having progress bar for source file generation

- Not having unnecessary Django version constraints

- Remove admin overwrite app because it may conflict with existing apps
- Simplify settings file when doing "cloudify"
- Fix several bugs for serving static content
- Prompt for project name if the tool cannot find it
- Force using urllib3 with version less than 1.25
- Also enable cloud build API
- Add E2E test for cloudify on GKE

- Make "cloudify" supports more Django applications
- Add E2E test for "cloudify"

Fix a bug for unable to show survey prompt.