[tests] move 'e621:frontend' tests into regular results/e621.py

having both e621.py and E621.py in the same directory messes with
Windows

6e919a3695 (commitcomment-152557303)

test/results/E621.py

@@ -1,25 +0,0 @@
-# -*- coding: utf-8 -*-
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-
-from gallery_dl.extractor import e621
-
-
-__tests__ = (
-{
-    "#url"     : "https://e621.cc/?tags=rating:safe",
-    "#category": ("E621", "e621", "frontend"),
-    "#class"   : e621.E621FrontendExtractor,
-    "#urls"    : "https://e621.net/posts?tags=rating:safe",
-},
-
-{
-    "#url"     : "https://e621.anthro.fr/?q=rating:safe",
-    "#category": ("E621", "e621", "frontend"),
-    "#class"   : e621.E621FrontendExtractor,
-    "#urls"    : "https://e621.net/posts?tags=rating:safe",
-},
-
-)

test/results/e621.py

@@ -147,4 +147,18 @@ __tests__ = (
     "#count"   : "> 260",
 },
 
+{
+    "#url"     : "https://e621.cc/?tags=rating:safe",
+    "#category": ("E621", "e621", "frontend"),
+    "#class"   : e621.E621FrontendExtractor,
+    "#urls"    : "https://e621.net/posts?tags=rating:safe",
+},
+
+{
+    "#url"     : "https://e621.anthro.fr/?q=rating:safe",
+    "#category": ("E621", "e621", "frontend"),
+    "#class"   : e621.E621FrontendExtractor,
+    "#urls"    : "https://e621.net/posts?tags=rating:safe",
+},
+
 )