client.Populate assign client to proxy

[hellodudu]

client.Populate should assign client to proxies first, otherwise it will panic if we call proxy.AddToxic()

[miry]

@hellodudu can you add tests to cover the panic?

[hellodudu]

Hi @miry, It's done.

[miry]

@hellodudu Thank you very much. Last steps:

1. Update Changelog.md with summary of your changes: next line after https://github.com/Shopify/toxiproxy/blob/master/CHANGELOG.md?plain=1#L5
2. There is small linting problem: extra empty line
3. Squash commits and rebase against master

[hellodudu]

@miry

1. done.
2. done.
3. I haven't squash commit on Github before, always use the "confirm squash and merge" comes from Github. I'm worried about squashing with errors when using git. Do you have right to "confirm squash and merge"?

[miry]

@hellodudu It looks like: git rebase -i HEAD~4 or git fetch upstream; git rebase -i upstream/master then you left first row uncahnged (check that it is your first commit), and all other change first word patch to squash.

In the end it would ask to provide description.

https://www.baeldung.com/ops/git-squash-commits#1-squash-the-last-x-commits

[miry]

@hellodudu If you want I can squash and try to combine your messages in one?

[hellodudu]

Yes please. I'm afraid of messing it up. Thanks a lot!

[miry]

@hellodudu thank you again for contribution ❤️ . Going to update my samples of toxiproxy usage.