Fixed admin page url variables generation

[rocketweb]

Description

When creating a Page entity that has a parameter in it's url attribute and belongs to the admin area, e.g. <page name="AdminProductEditPage" url="catalog/product/edit/id/{{id}}/" area="admin" module="Magento_Catalog" parameterized="true"> then you call inside a test by using a created entity like this:

<createData entity="_defaultCategory" stepKey="createCategory"/>
 <createData entity="_defaultProduct" stepKey="createSimpleStandaloneProduct">
       <requiredEntity createDataKey="createCategory"/>
</createData>

<amOnPage url="{{AdminProductEditPage.url($$createSimpleStandaloneProduct.id$$)}}" stepKey="goToProductEditPage1"/>

After generating the test, the goToProductEditPage1 step should look like this:

$I->amOnPage("/" . getenv("MAGENTO_BACKEND_NAME") . "/catalog/product/edit/id/" . $this->createSimpleStandaloneProduct->getCreatedDataByName('id') . "/");

But it actually looks like this:

$I->amOnPage("/" . getenv("MAGENTO_BACKEND_NAME") . "/catalog/product/edit/id/$$createSimpleStandaloneProduct.id$$/");

So the $$createSimpleStandaloneProduct.id$$ variable isn't being generated. This only happens to pages that belong to the admin area. This PR attempts to fix this by taking the variables the do the str_replace and first replacing the environment variables inside them before continuing with the code execution.

Fixed Issues (if relevant)

1. Parameter references not getting generated in admin page URLs #77: Parameter references not getting generated in admin page URLs

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/verification tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)
• Changes to Framework doesn't have backward incompatible changes for tests or have related Pull Request with fixes to tests

[coveralls]

Coverage remained the same at 57.406% when pulling 9f1c77f on rocketweb:fix-admin-page-url-variable-generation into 825e8e9 on magento:develop.

[okolesnyk]

Hello, @rocketweb
Please sign licence/cla, because otherwise I can not process this Pull Request.

[okolesnyk]

@rocketweb Thank you very much, we will include it into 2.3.1 upcoming release.