[py] Allows setting Remote webdriver ca_certs through REQUESTS_CA_BUNDLE env variable. (#11957)

Author: miguelius

py/selenium/webdriver/remote/remote_connection.py

@@ -134,7 +134,7 @@ class RemoteConnection:
 
     browser_name = None
     _timeout = socket._GLOBAL_DEFAULT_TIMEOUT
-    _ca_certs = certifi.where()
+    _ca_certs = os.getenv("REQUESTS_CA_BUNDLE") if "REQUESTS_CA_BUNDLE" in os.environ else certifi.where()
 
     @classmethod
     def get_timeout(cls):
@@ -162,7 +162,8 @@ def reset_timeout(cls):
     def get_certificate_bundle_path(cls):
         """
         :Returns:
-            Paths of the .pem encoded certificate to verify connection to command executor
+            Paths of the .pem encoded certificate to verify connection to command executor. Defaults 
+            to certifi.where() or REQUESTS_CA_BUNDLE env variable if set.            
         """
         return cls._ca_certs