Internal server error when running without --wallet-type indy

[nrempel]

For example, I run the software like this:

PORTS="5000:5000" ./scripts/run_docker start -it http 0.0.0.0 8000 -ot http --admin 0.0.0.0 5000 --admin-insecure-mode --seed 255h235iu2yg354uiyg234i5iu2yg54i --endpoint http://localhost:8000 --genesis-url http://test.bcovrin.vonx.io/genesis

Then I call POST /schemas

The server response is:

500 Internal Server Error

Server got itself in trouble

The following error is produced in the logs:

2020-05-21 17:34:18,369 aries_cloudagent.core.dispatcher ERROR Handler error: schemas_send_schema
Traceback (most recent call last):
  File "/home/indy/aries_cloudagent/messaging/schemas/routes.py", line 105, in schemas_send_schema
    ledger: BaseLedger = await context.inject(BaseLedger)
  File "/home/indy/aries_cloudagent/config/injection_context.py", line 126, in inject
    return await self.injector.inject(base_cls, settings, required=required)
  File "/home/indy/aries_cloudagent/config/injector.py", line 83, in inject
    "No instance provided for class: {}".format(base_cls.__name__)
aries_cloudagent.config.base.InjectorError: No instance provided for class: BaseLedger
2020-05-21 17:34:18,370 aiohttp.server ERROR Error handling request
Traceback (most recent call last):
  File "/home/indy/.pyenv/versions/3.6.9/lib/python3.6/site-packages/aiohttp/web_protocol.py", line 418, in start
    resp = await task
  File "/home/indy/.pyenv/versions/3.6.9/lib/python3.6/site-packages/aiohttp/web_app.py", line 458, in _handle
    resp = await handler(request)
  File "/home/indy/.pyenv/versions/3.6.9/lib/python3.6/site-packages/aiohttp/web_middlewares.py", line 119, in impl
    return await handler(request)
  File "/home/indy/.pyenv/versions/3.6.9/lib/python3.6/site-packages/aiohttp_apispec/middlewares.py", line 45, in validation_middleware
    return await handler(request)
  File "/home/indy/aries_cloudagent/admin/server.py", line 192, in apply_limiter
    return await task
  File "/home/indy/aries_cloudagent/messaging/schemas/routes.py", line 105, in schemas_send_schema
    ledger: BaseLedger = await context.inject(BaseLedger)
  File "/home/indy/aries_cloudagent/config/injection_context.py", line 126, in inject
    return await self.injector.inject(base_cls, settings, required=required)
  File "/home/indy/aries_cloudagent/config/injector.py", line 83, in inject
    "No instance provided for class: {}".format(base_cls.__name__)
aries_cloudagent.config.base.InjectorError: No instance provided for class: BaseLedger

We should catch the error a return a more useful message to the user.

The problem is that the following command line flag was missing: --wallet-type indy

[sklump]

#533
addresses