add tests Fails with PHPUnit

PhakeTest::testCallOrderInObjectFailsWithPHPUnit()
Phake_ClassGenerator_InvocationHandler_FrozenObjectCheckTest::testThrowsWhenObjectIsFrozenWithPHPUnit()
use getClient() in Phake::inOrder and Phake_ClassGenerator_InvocationHandler_FrozenObjectCheck
revert to default client in PhakeTest (just in case)
Merge pull request #74 from ngyuki/patch-use-phpunit-client

thrown exception of Phake, Even if setting PHPUnit Client.