Ignore unreachable ogServers

Otherwise, ogCP crashes trying to connect to unreachable ogServers.

ogcp/og_server.py

@@ -23,9 +23,12 @@ class OGServer:
         self.HEADERS = {'Authorization' : self.api_token}
 
     def get(self, path, payload=None):
-        r = requests.get(f'{self.URL}{path}',
-                         headers=self.HEADERS,
-                         json=payload)
+        try:
+            r = requests.get(f'{self.URL}{path}',
+                             headers=self.HEADERS,
+                             json=payload)
+        except requests.exceptions.ConnectionError:
+            return None
         return r
 
     def post(self, path, payload):

ogcp/views.py

@@ -201,6 +201,8 @@ def multi_request(method, uri, payload=None):
         else:
             raise Exception('Invalid method, use get or post')
 
+        if not r:
+            continue
         response['server'] = server
         response['json'] = r.json()
         responses.append(response)