executeInSelenium generation fix #2

[zakdma]

executeInSelenium action does not generate proper code because it escape all double quotes in function attribute value

Steps to reproduce

1. Create test with executeInSelenium action
   <executeInSelenium function="function ($webdriver) { return &quot;Hello, World!&quot;}" stepKey="testStep"/>
2. Run vendor/bin/mftf generate:tests

Expected result

There is generated action
$I->executeInSelenium(function ($webdriver) { return "Hello, World!"});
Double quotes are not escaped.

Actual result

There is generated action
$I->executeInSelenium(function ($webdriver) { return \"Hello, World!\"});
Double quotes are escaped.

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 decreased (-0.7%) to 52.308% when pulling 43ffdbb on zakdma:executeInSelenium2 into 5a4909c on magento:develop.

[zakdma]

@jilu1 @KevinBKozan please consider to review and merge this PR. It is very important to us be able to use double quotes inside executeInSelenium.

[soumyau]

Running a build to see if changes are not breaking any current tests. Will keep you posted.

[soumyau]

@zakdma Builds looks good with this change.