regression for @expectedExceptionMessage feature
add message regex expectation for Util\Test
make Util\Test aware of @expectedExceptionMessageRegExp
add tests for Framework\Constraint\ExceptionMessageRegExp
add implementation for Framework\Constraint\ExceptionMessageRegExp
add failing tests for TestCase::setExpectedExceptionRegExp API
add failing testes for TestCase @expectExceptionMessageRegExp awareness
add implementation for TestCase::setExpectedExceptionRegExp api
make TestCase aware of @expectedExceptionMessageRegExp and Constraint\ExceptionMessageRegExp
tweak test coverage for Constraint\ExceptionMessageRegExp::matches and invalid regex edge case
Merge pull request #1358 from marcioAlmada/patch/exception-message-regex

Patch for exception message expectations
Clean up #1358.