create a user for Test_Cache_File to allow unit tesing within ci

tests/lib/cache/file.php

@@ -22,7 +22,7 @@
 
 class Test_Cache_File extends Test_Cache {
 	function skip() {
-		$this->skipUnless(OC_User::isLoggedIn());
+		//$this->skipUnless(OC_User::isLoggedIn());
 	}
 	
 	public function setUp(){
@@ -39,6 +39,13 @@ class Test_Cache_File extends Test_Cache {
 		OC_Filesystem::clearMounts();
 		OC_Filesystem::mount('OC_Filestorage_Temporary',array(),'/');
 
+		//login
+		if (OC_User::userExists('test'))
+			OC_User::deleteUser('test');
+		OC_User::createUser('test', 'testtesttest');
+
+		OC_User::login('test', 'testtesttest');
+
 		//set up the users dir
 		$rootView=new OC_FilesystemView('');
 		$rootView->mkdir('/'.OC_User::getUser());