Merge remote-tracking branch 'm2mainline/develop' into develop

CHANGELOG.md

app/code/Magento/AdminNotification/Setup/InstallSchema.php

app/code/Magento/AdminNotification/composer.json

app/code/Magento/Authorization/composer.json

app/code/Magento/Backend/composer.json

app/code/Magento/Backup/composer.json

app/code/Magento/Bundle/Api/Data/LinkInterface.php

...ode/Magento/Bundle/Api/ProductLinkManagementInterface.php

app/code/Magento/Bundle/Model/Link.php

app/code/Magento/Bundle/Model/LinkManagement.php

app/code/Magento/Bundle/Model/OptionRepository.php

app/code/Magento/Bundle/Model/Plugin/BundleLoadOptions.php

app/code/Magento/Bundle/Model/Plugin/BundleSaveOptions.php

app/code/Magento/Bundle/Model/Product/LinksList.php

app/code/Magento/Bundle/Model/Selection.php

...gento/Bundle/Model/Source/Option/Selection/Price/Type.php

...ode/Magento/Bundle/Test/Unit/Model/LinkManagementTest.php

...e/Magento/Bundle/Test/Unit/Model/OptionRepositoryTest.php

...o/Bundle/Test/Unit/Model/Plugin/BundleLoadOptionsTest.php

...o/Bundle/Test/Unit/Model/Plugin/BundleSaveOptionsTest.php