use DokuWikiTest class instead of PHPUnit_Framework_TestCase

_testing/tests/inc/auth_aclcheck.test.php

_testing/tests/inc/auth_admincheck.test.php

_testing/tests/inc/auth_nameencode.test.php

_testing/tests/inc/common_cleanText.test.php

_testing/tests/inc/common_clientip.test.php

_testing/tests/inc/common_obfuscate.test.php

_testing/tests/inc/common_pagetemplate.test.php

_testing/tests/inc/form_form.test.php

_testing/tests/inc/httpclient_http.test.php

_testing/tests/inc/init_fullpath.test.php

_testing/tests/inc/init_getbaseurl.test.php

_testing/tests/inc/ixr_library_date.test.php

_testing/tests/inc/ixr_library_ixr_message.test.php

_testing/tests/inc/mail_isvalid.test.php

_testing/tests/inc/mail_quoted_printable_encode.test.php

_testing/tests/inc/pageutils_clean_id.test.php

_testing/tests/inc/pageutils_getid.test.php

_testing/tests/inc/pageutils_resolve_id.test.php

_testing/tests/inc/pageutils_resolve_pageid.test.php

_testing/tests/inc/parser/lexer.test.php