fix duplicate slugs in tests

Author: PetrDlouhy

categories/fixtures/musicgenres.json

@@ -2292,7 +2292,7 @@
 	    "name": "Country pop",
 	    "parent": 142,
 	    "level": 1,
-	    "slug": "country-pop",
+	    "slug": "country-pop_1",
 	    "lft": 100,
 	    "tree_id": 10,
 	    "order": 1

categories/tests/test_category_import.py

@@ -57,7 +57,7 @@ def testMixingTabsSpaces(self):
         Should raise an exception.
         """
         string1 = ["cat1", "    cat1-1", "\tcat1-2-FAIL!", ""]
-        string2 = ["cat1", "\tcat1-1", "    cat1-2-FAIL!", ""]
+        string2 = ["cat1a", "\tcat1-1a", "    cat1-2-FAIL!", ""]
         cmd = Command()
 
         # raise Exception