Fix Maptiler tests for py2.7

____________________ MapTilerTestCase.test_geocode_language ____________________
test/geocoders/maptiler.py:86: in test_geocode_language
    {"latitude": 47.3723, "longitude": 8.5422, "delta": 1},
test/geocoders/util.py:49: in geocode_run
    result = self._make_request(self.geocoder.geocode, **payload)
test/geocoders/util.py:86: in _make_request
    result = call(*args, **kwargs)
geopy/geocoders/maptiler.py:140: in geocode
    quoted_query = quote(query.encode('utf-8'))
E   UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1: ordinal not in range(128)
____________________ MapTilerTestCase.test_reverse_language ____________________
test/geocoders/maptiler.py:80: in test_reverse_language
    self.assertIn("チューリッヒ", location.address)
E   UnicodeDecodeError: 'ascii' codec can't decode byte 0xe3 in position 0: ordinal not in range(128)

test/geocoders/maptiler.py

@@ -77,15 +77,15 @@ def test_reverse_language(self):
             {"query": zurich_point, "exactly_one": True, "language": "ja"},
             {"latitude": 47.3723, "longitude": 8.5422, "delta": 1},
         )
-        self.assertIn("チューリッヒ", location.address)
+        self.assertIn(u("\u30c1\u30e5\u30fc\u30ea\u30c3\u30d2"), location.address)
 
     def test_geocode_language(self):
         location = self.geocode_run(
-            {"query": "Zürich", "exactly_one": True, "language": "ja",
+            {"query": u("Z\u00fcrich"), "exactly_one": True, "language": "ja",
              "proximity": Point(47.3723, 8.5422)},
             {"latitude": 47.3723, "longitude": 8.5422, "delta": 1},
         )
-        self.assertIn("チューリッヒ", location.address)
+        self.assertIn(u("\u30c1\u30e5\u30fc\u30ea\u30c3\u30d2"), location.address)
 
     def test_geocode_raw(self):
         result = self.geocode_run({"query": "New York"}, {})