- fixed wrong method name

- fix. added additional check during saving gift messages

- removed changes related to api-functional tests for gift messages, due to https://jira.corp.x.com/browse/MAGETWO-35644

[Publication] M2 GitHub Update (version 0.74.0-beta2)

[South] Sprint 33

 - fixed random test

 - Fixed outdated references to \Magento\GiftMessage\Helper\Message::isMessagesAllowed as this method has been refactored and renamed from isMessagesAvailable

 - Fixed outdated references to \Magento\GiftMessage\Helper\Message::isMessagesAllowed as this method has been refactored and renamed from getIsMessagesAvailable

 - Additional code style changes to fix L3

 - Code style changes to fix L3

Merge branches 'MAGETWO-6761-Incorrect-Url-When-Duplicate-3' and 'develop' of github.scm.corp.ebay.com:magento-api/magento2ce into develop

Merge branch 'MAGETWO-35288-Fix-REST-Api-Documentation' of github.scm.corp.ebay.com:magento-api/magento2ce into develop

Merge branches 'MAGETWO-27932-Create-Gift-Message-Extension-For-Order' and 'develop' of github.scm.corp.ebay.com:magento-api/magento2ce into develop

 - fixed random test

 - added mock for interval because all data providers run before any test for suite

- Uses getModelMock() everywhere
- Clarifies variables in data providers

Conflicts:
	app/code/Magento/Payment/Block/Info/Cc.php

 - fixed unit test

Merge remote-tracking branch 'mainline/develop' into MAGETWO-27932-Create-Gift-Message-Extension-For-Order

- fix due to CR's comments

- added handling of exception