Added proxy variable to read values from environment

What type of PR is this?
/kind bug

What this PR does / why we need it:
This PRs will read environment variables assigned for proxy and no_proxy.

Update ws_client_test.py

Update configuration.py
What type of PR is this?
/kind bug

What this PR does / why we need it:
This PRs will read environment variables assigned for proxy and no_proxy.

Update configuration.py

Add debug logging doc and example

add .readthedocs.yaml config file

Added

Added insert_proxy_config.sh to edit configuration.py in client

Revert "Added insert_proxy_config.sh to edit configuration.py in client"

This reverts commit b295c2ddcbb838196823c4d7a55a67fd1d1dc290.

To avoid condition self.no_proxy is already present