Move random::string() to be test::random_string() and have it return a

random string of any length.  Also introduce test::lorem_ipsum() and
use that in places where we want strings of words.  Fixes #1713.

modules/gallery/tests/Albums_Controller_Test.php

@@ -31,7 +31,7 @@ class Albums_Controller_Test extends Gallery_Unit_Test_Case {
     $album = test::random_album();
 
     // Randomize to avoid conflicts.
-    $new_name = "new_name_" . random::string(6);
+    $new_name = "new_name_" . test::random_string(6);
 
     $_POST["name"] = $new_name;
     $_POST["title"] = "new title";