- Unset the http proxies environments for the `TestWebhookProxy`.
- Resolves#2132
(cherry picked from commit 244b9786fc431c362c6f5ac971ac4d04b97f78a2)
(cherry picked from commit 8602dfa6a21e1ac9fa0fc6f5952da219a57b2613)
(cherry picked from commit 862144920945575c26e026281aab6e9bf3e00c5c)
(cherry picked from commit aefa77f917b58dc9e3fc013790aaa286f0beda5b)