Create server rest API

[pcrespov]

Focus: Unify services APIs paths and models (both architecture and development tools)

• [x] authentication api (specs only) (required by #200)
• [x] Health-check api + handler (logic), returns whether the service runs, DB connected, etc..
• [x] director access using its client-sdk (needs separate files requires #185)
• [x] apidoc should only expose entrypoints (no /qxapp...)
• [x] create ORM classes and init db
• Minimal routes
  • [x] api/v1/$auth
  • [x] api/v1/openapi.json → {open api}: /apidoc/swagger.yaml?spec=/v1
  • [x] api/v1/projects endpoint
• [x] upgrade Dockerfile to include .venv and pip install 3rd/2nd parties
• [x] generate python/js client-sdk for this service: webserver-sdk

child of #19 and related with issue #148 blocks #188

[sanderegg]

• The server shall not stop starting when there is an issue in accessing an external service (such as database,...). It should report it in a healthcheck

[pcrespov]

~bug~

• Makes test_login[pyloop] fail
• Cannot use security features with aiohttp_apiset module.
• swagger pass the request argument as key-argument adn aiohttp_security middleware expects it as last positional argument

  File "/home/crespo/devp/osparc-simcore/.venv/lib/python3.6/site-packages/aiohttp_session/__init__.py", line 149, in factory
  response = await handler(request)
  File "/home/crespo/devp/osparc-simcore/.venv/lib/python3.6/site-packages/aiohttp_apiset/middlewares.py", line 96, in process
  response = await handler(request)
  File "/home/crespo/devp/osparc-simcore/services/web/server/src/simcore_service_webserver/rest/middlewares.py", line 12, in handle_errors
  response = await handler(request)
  File "/home/crespo/devp/osparc-simcore/.venv/lib/python3.6/site-packages/aiohttp_apiset/swagger/route.py", line 90, in handler
  response = await self._handler(**parameters)
  File "/home/crespo/devp/osparc-simcore/.venv/lib/python3.6/site-packages/aiohttp_security/api.py", line 136, in wrapped
  request = args[-1]

options

• can create a thin middleware <-- tmp created this
• modify aiohttp_security <-- did PR aio-libs/aiohttp-security#186

       def wrapped(*args, **kwargs):
          request = kwargs.get('request',  args[-1] if args else None)
          if not isinstance(request, web.BaseRequest):
              msg = ("Incorrect decorator usage. "
                     "Expecting `def handler(request)` "
                     "or `def handler(self, request)`.")
              raise RuntimeError(msg)