Fixes #850 for PHPUnit 5/6/7 compatibilities

[prisis]

Thx for the first try @barryvdh

[patrickarnold79]

Thanks @prisis, I'm facing the same issues you are addressing here.

[davedevelopment]

I think this looks ok, are all of the changes necessary for the PHPUnit compatibility or was some of it tidying up?

[prisis]

All of them are necessary, phpunit added a validator, so i had to remove some keys

[maks-rafalko]

when are going to release this @davedevelopment?

[rcwsr]

I still get this error with these dependencies:

        "phpunit/phpunit": "~5.7",
        "mockery/mockery": "dev-master",

PHP Fatal error:  Uncaught Error: Class 'PHPUnit\Util\Blacklist' not found in /.../vendor/mockery/mockery/library/Mockery/Adapter/Phpunit/Legacy/TestListenerTrait.php:88
Stack trace:
#0 /.../vendor/mockery/mockery/library/Mockery/Adapter/Phpunit/Legacy/TestListenerForV5.php(45): Mockery\Adapter\Phpunit\Legacy\TestListenerTrait->startTestSuite()
#1 /.../vendor/phpunit/phpunit/src/Framework/TestResult.php(359): Mockery\Adapter\Phpunit\Legacy\TestListenerForV5->startTestSuite(Object(PHPUnit_Framework_TestSuite))
#2 /.../vendor/phpunit/phpunit/src/Framework/TestSuite.php(666): PHPUnit_Framework_TestResult->startTestSuite(Object(PHPUnit_Framework_TestSuite))
#3 /.../vendor/phpunit/phpunit/src/TextUI/TestRunner.php(517): PHPUnit_Framework_TestSuite->run(Object(PHPUnit_Framework_TestResult))
#4 /.../vendor/phpunit/phpunit/src/TextUI/Command.php(186): PHPUnit_TextUI_TestRunner->doRun(Object(PHPUnit_Framework_TestSuite), Ar in /.../vendor/mockery/mockery/library/Mockery/Adapter/Phpunit/Legacy/TestListenerTrait.php on line 88
PHPUnit 5.7.27 by Sebastian Bergmann and contributors.

[rcwsr]

I think because this class does exist:
\PHPUnit\Framework\TestCase in vendor/phpunit/phpunit/src/ForwardCompatibility/TestCase.php

[prisis]

can you show me the phpunit full version, from composer install output?

[prisis]

i need to change the if check... i will do it asap

[rcwsr]

"name": "phpunit/phpunit",
"version": "5.7.27",
"version_normalized": "5.7.27.0",
"source": {
    "type": "git",
    "url": "https://github.com/sebastianbergmann/phpunit.git",
    "reference": "b7803aeca3ccb99ad0a506fa80b64cd6a56bbc0c"
},

"name": "mockery/mockery",
"version": "dev-master",
"version_normalized": "9999999-dev",
"source": {
    "type": "git",
    "url": "https://github.com/mockery/mockery.git",
    "reference": "5097491b4cd4e2baf325daac344e80fdcdd4a5ed"
},