make ftp and socks proxies optional

[georgejdli]

Ran into this issue with 4.13.0.0 when trying to use the firefox driver config:

org.openqa.selenium.SessionNotCreatedException: Could not start a new session. Response code 500. Message: Since Firefox 90 'ftpProxy' is no longer supported

And ran into this on Chrome, Edge, and Firefox driver config where the plugin was not setting the socksVersion in the org.openqa.selenium.Proxy object (default value is null) :

org.openqa.selenium.SessionNotCreatedException: Could not start a new session. Response code 400. Message: invalid argument: entry 0 of 'firstMatch' is invalid
from invalid argument: cannot parse capability: proxy
from invalid argument: 'socksVersion' must be between 0 and 255 

So I dug into the source code and found that there's no way to selectively unset the different protocol proxies to sidestep these issues.

This PR aims to address this issue by allowing the user to unset FTP and SOCKS proxies individually by adding the appropriate check boxes for the user to toggle.

If the maintainers are receptive to this change I'm open to any feedback required to get this PR into an acceptable state for merging.

[undera]

It looks ok from the code. How did you test it?

[georgejdli]

It looks ok from the code. How did you test it?

I built the plugin jar and put it in my $JMETER_BIN/lib/ext folder to test out the changes with a sample test plan.

I have preserved the default behavior so the existing test cases all pass.

[undera]

Sounds good! Thank you

[undera]

Please do pull from master branch, so the GH Actions build will run

[rbourga]

Hi Guys,
For this new version to be picked up by plugin manager, you would also need to update jmeter-plugins/site/dat/repo
/jpgc-plugins.json file in the jmeter-plugins repo accordingly with a new version number for the new webdriver together with its appropriate references.