Remove Zend_Json from the unit test in the CustomerImportExport module

[dmanners]

Since Zend Framework1 is EOF then we should start to move away from it.

This PR removes the usage of Zend_Json in the CustomerImportExport module.

[orlangur]

Cool! 👍

But, it can be removed from all tests at once, I observe 38 occurrences of Zend_Json in *Test.php.

Just to decrease the overhead of multiple pull requests processing ;)

[dmanners]

Hi @orlangur I have been working through module by module simply so that I can encapsulate the changes. I dont just want to do a find an replace on the full code base and then try to fix all the problems. For me smaller changes like this is actually how you get a monolith moving in the right direction.

[orlangur]

@dmanners, ok, you can go your way, no offense.

just want to do a find an replace on the full code base and then try to fix all the problems

That's exactly how I like to do it :) Most likely there would be no problem with tests, otherwise some of them could be left untouched (like this: orlangur@77a6b51). Fix as much problems as possible all over the code + leave some tricky cases for further atomic implementation. The thing which would make me sad is fixing tests manually which can be done automatically and only once.

[dmanners]

@orlangur dont worry no offence taken. I just started this by stripping out Zend_Json overall places and then had to scale it back step by step. These things take time.

[ishakhsuvarov]

@dmanners We have now merged your PR to the develop branch. Thank you for your contribution!