issue2551334 - Get test suite to pass using windows python

Mark classes that use requests library with skip markers if requests is
not available.

Author: rouilj

test/test_liveserver.py

@@ -139,6 +139,7 @@ def create_app(self):
             return RequestDispatcher(self.dirname)
 
 
+@skip_requests
 class BaseTestCases(WsgiSetup):
     """Class with all tests to run against wsgi server. Is reused when
        wsgi server is started with various feature flags
@@ -1217,6 +1218,7 @@ def test_fts(self):
         f = requests.get(self.url_base() + "?@search_text=RESULT")
         self.assertIn("foo bar", f.text)
 
+@skip_requests
 class TestFeatureFlagCacheTrackerOff(BaseTestCases, WsgiSetup):
     """Class to run all test in BaseTestCases with the cache_tracker
        feature flag disabled when starting the wsgi server
@@ -1232,6 +1234,7 @@ def create_app(self):
             return RequestDispatcher(self.dirname, feature_flags=ff)
 
 @skip_postgresql
+@skip_requests
 class TestPostgresWsgiServer(BaseTestCases, WsgiSetup):
     """Class to run all test in BaseTestCases with the cache_tracker
        feature enabled when starting the wsgi server
@@ -1319,6 +1322,7 @@ def test_native_fts(self):
         f = requests.get(self.url_base() + "?@search_text=ts:RESULT")
         self.assertIn("foo bar RESULT", f.text)
 
+@skip_requests
 class TestApiRateLogin(WsgiSetup):
     """Class to run test in BaseTestCases with the cache_tracker
        feature flag enabled when starting the wsgi server