Convert Codementor to use the Status Code detection method. The site gives a clean 404 error. Add to tests.

data.json

@@ -132,8 +132,7 @@
     "urlMain": "https://www.codecademy.com/"
   },
   "Codementor": {
-    "errorMsg": "404",
-    "errorType": "message",
+    "errorType": "status_code",
     "rank": 12456,
     "url": "https://www.codementor.io/{}",
     "urlMain": "https://www.codementor.io/"

tests/all.py

@@ -160,7 +160,7 @@ class SherlockSiteCoverageTests(SherlockBaseTest):
         self.username_check(['noonewouldeverusethis7'],
                             ["Academia.edu", "9GAG", "About.me", "AngelList",
                              "BLIP.fm", "Bandcamp", "Behance", "BuzzFeed",
-                             "Codecademy"
+                             "Codecademy", "Codementor"
                             ],
                             exist_check=False
                            )
@@ -184,7 +184,7 @@ class SherlockSiteCoverageTests(SherlockBaseTest):
         self.username_check(['blue'],
                             ["Academia.edu", "9GAG", "About.me", "AngelList",
                              "BLIP.fm", "Bandcamp", "Behance", "BuzzFeed",
-                             "Codecademy"
+                             "Codecademy", "Codementor"
                             ],
                             exist_check=True
                            )