#7915: customer objects are equal to eachother after observing event customer_save_after_data_object

[RomaKis]

Description

Fixed Issues (if relevant)

1. customer objects are equal to eachother after observing event customer_save_after_data_object  #7915: customer objects are equal to eachother after observing event customer_save_after_data_object customer objects are equal to eachother after observing event customer_save_after_data_object.

Manual testing scenarios

1. Log in with existing user in frontend.
2. Change first name of customer to 'test35'.
3. Observe the event 'customer_save_after_data_object'. Two objects are given called : 'orig_customer_data_object' & 'customer_data_object'.
4. Those two objects are identical to each other. First name in both objects is equal to 'test35'

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• 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)

[magento-cicd2]

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