Modify `conduct load-license` to treat 403 the same as 401 and 303 and thus delete auth-token file when invalid

[longshorej]

Fixes #497

The thing I'm not clear on is why we were treating 403 differently to begin with. @fsat can you comment on that?

[fsat]

@longshorej - I think 403 indicates user hasn't accepted T&C, hence we don't prompt for the token:

An HTTP 403 (forbidden) status indicates that, while the user is able to be authenticated, they are unable to obtain a license given that they have not accepted Terms and Conditions. The following message should be output:

Please accept our terms and conditions first. Please visit https://www.lightbend.com/account/access-token to accept them.

This is from the end of page 2 of the Limited Use Production Suite Solution Design:

https://docs.google.com/document/d/1zqHR6EcYJ1tnwS_3Xr-tT5wkM6netwu9iEV6xH2dvRM/edit#

[huntc]

I don't know if the solution design caters for reality. Kiki had a bad access token on disk for some reason... we need to be able to cater for that. I had to have her explicitly remove the access token file.

[fsat]

@huntc - we can use conduct load-license -f to force the prompt though?

192-168-1-5:pr-490 felixsatyaputra$ conduct load-license --help
usage: conduct load-license [-h] [--scheme SCHEME] [--host HOST] [-i IP]
                            [-p PORT] [--base-path BASE_PATH]
                            [--api-version {1,2}] [--offline]
                            [--settings-dir CLI_SETTINGS_DIR]
                            [--custom-settings-file CUSTOM_SETTINGS_FILE]
                            [--custom-plugins-dir CUSTOM_PLUGINS_DIR] [-q]
                            [-v] [-f]

optional arguments:
  -h, --help            show this help message and exit
...
  -f, --force           Always prompts for authentication token when specified,
                        use this option to change authentication token between different users

[huntc]

OMG - I forgot about that... can we highlight that in our message then?

[fsat]

@huntc - sure we can, I'll create a PR for this.

[fsat]

Closed in lieu of #501 which highlights conduct load-license -f when license or token related error occurs.