MAGETWO-84124: Add bundle parent/child relationship during import

[adam-paterson]

Description

• Save parent/child relationships for bundled products during import process.

Fixed Issues (if relevant)

1. magento/magento2#12330: Imported bundle products are not assigned stock status

2. 80

Manual testing scenarios

1. Create Bundled product with options
2. Export product via System -> Import/Export
3. Re-upload CSV choosing "Replace" method

Contribution checklist

• [x] Pull request has a meaningful description of its purpose
• [x] All commits are accompanied by meaningful commit messages
• [x] All new or changed code is covered with unit/integration tests (if applicable)
• [ ] All automated tests passed successfully (all builds on Travis CI are green)

[dmanners]

Hi @adam-paterson feel free to update this to match the other PR or if you would prefer you can use our backport tool. https://github.com/magento/magento2/wiki/Simple-way-to-port-your-solutions-automatically

[magento-cicd2]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
0 out of 6 committers have signed the CLA.

:x: slavvka
:x: rogyar
:x: sidolov
:x: magento-engcom-team
:x: magento-team
:x: ferrazzuk

[dmanners]

Hi @adam-paterson I am going to close this PR since it seems to be all messed up with commits etc and also it seems to have been fixed on 2.2-develop by the core team. See https://github.com/magento/magento2/commit/ec8830fcd9b86ce75aa2a3cc685fa83316dcc971 for the core fix.