Adds a platform admin button to the service settings to turn on/off
'upload_document' service permission. The permission allows uploading
documents to document-download-api through the post notification API
endpoint.
we were seeing isort produce different outputs locally and in docker -
this was due to it having different opinions about whether the tests
module (ie all our unit tests) is a first party (local) or third party
(pip installed) import. It's a first party import, so by defining this
in the setup.cfg isort settings, we can force it to be consistent
between environments.
Note: I don't know why it was different in the first place though
Done using isort[1], with the following command:
```
isort -rc ./app ./tests
```
Adds linting to the `run_tests.sh` script to stop badly-sorted imports
getting re-introduced.
Chosen style is ‘Vertical Hanging Indent’ with trailing commas, because
I think it gives the cleanest diffs, eg:
```
from third_party import (
lib1,
lib2,
lib3,
lib4,
)
```
1. https://pypi.python.org/pypi/isort
Users can choose whether to have these features on or off now. And
a platform admin can still use the same controls to switch the features
on or off on behalf of a user. There’s no need for the separate buttons.
As before the service manager will not be able to change the Text message sender once they have the inbound sms permission.
If the inbound sms permission is turned off the Text message sender setting is once more configurable by the service manager.
The inbound number remains bound to the service, but has "inactive", so that the number can not be used again.
