text: Title: [Migrated] zappa deploy fails with import error even though the module is present in the package
  Body: Originally from: https://github.com/Miserlou/Zappa/issues/1687 by [wholeinsoul](https://github.com/wholeinsoul)
  
  ## Context
  I have django project that works locally and in elasticbeanstalk. Now I'm trying to deploy it to AWS lambda using zappa. But I'm getting the following error even though the module urllib3 is present in the package zip. 
  
  ```
  No module named urllib3: ImportError
  Traceback (most recent call last):
    File "/var/task/handler.py", line 580, in lambda_handler
    return LambdaHandler.lambda_handler(event, context)
    File "/var/task/handler.py", line 245, in lambda_handler
    handler = cls()
    File "/var/task/handler.py", line 151, in __init__
    wsgi_app_function = get_django_wsgi(self.settings.DJANGO_SETTINGS)
    File "/var/task/zappa/ext/django_zappa.py", line 20, in get_django_wsgi
    return get_wsgi_application()
    File "/tmp/task/django/core/wsgi.py", line 14, in get_wsgi_application
    django.setup()
    File "/tmp/task/django/__init__.py", line 17, in setup
    configure_logging(settings.LOGGING_CONFIG, settings.LOGGING)
    File "/tmp/task/django/conf/__init__.py", line 48, in __getattr__
    self._setup(name)
    File "/tmp/task/django/conf/__init__.py", line 44, in _setup
    self._wrapped = Settings(settings_module)
    File "/tmp/task/django/conf/__init__.py", line 92, in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
    File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
    File "/var/task/api/settings/test.py", line 4, in <module>
    File "/tmp/task/elasticsearch/__init__.py", line 17, in <module>
    from .client import Elasticsearch
    File "/tmp/task/elasticsearch/client/__init__.py", line 5, in <module>
    from ..transport import Transport
    File "/tmp/task/elasticsearch/transport.py", line 5, in <module>
    from .connection import Urllib3HttpConnection
    File "/tmp/task/elasticsearch/connection/__init__.py", line 3, in <module>
    from .http_urllib3 import Urllib3HttpConnection
    File "/tmp/task/elasticsearch/connection/http_urllib3.py", line 2, in <module>
    import urllib3
  ```
  
  My project directory structure is:
  <project_name>/api --> this has all my django apps and code
                             /manage.py
                            /zappa_settings.json
  
  Environment
  zappa: 0.47.0
  docker image built using https://github.com/danielwhatmuff/zappa
  python 2.7
  venv)bash-4.2# pip freeze | grep url
  urllib3==1.20
  
  zappa_settings.json:
  ```
  {
      "dev": {
          "django_settings": "api.settings.test", 
          "profile_name": null, 
          "project_name": "server", 
          "runtime": "python2.7", 
          "s3_bucket": "zappa-server-localhost",
          "slim_handler": true,
          "exclude": [
                      "*.mp4",
                      "*.ogv",
                      "*.webm",
                      "logs",
                      "*.log",
                      "media",
                      "static_dirs",
                      ".git",
                      ".elasticbeanstalk",
                      ".ropeproject"
                     ],
          "environment_variables": {
                  //removed
          }
      },
  }
  ```
  