[py] verify command_executor ssl certificate by default (#6536)

* [py] verify command_executor ssl certificate by default

And expose get_certificate_bundle_path / set_certificate_bundle_path to
allow customizing the certificate verification

* [py] add urllib3[secure] dependency to test systems

Co-authored-by: Jérome Perrin <jerome@nexedi.com>
Co-authored-by: David Burns <david.burns@theautomatedtester.co.uk>
Cr-Mirrored-From: https://chromium.googlesource.com/external/github.com/SeleniumHQ/selenium
Cr-Mirrored-Commit: bbc0ec057b2aedb584e5a99ba1f0842e9b4fa4f6
diff --git a/setup.py b/setup.py
index 2b18186..c342c6e 100755
--- a/setup.py
+++ b/setup.py
@@ -67,7 +67,7 @@
                  'selenium.webdriver.remote',
                  'selenium.webdriver.support', ],
     'include_package_data': True,
-    'install_requires': ['urllib3'],
+    'install_requires': ['urllib3[secure]'],
     'zip_safe': False
 }