redfish/rest: implement .netrc support

[dev-zero]

this adds a use_netrc flag to the client, permitting it to consult ~/.netrc in the same way as the "-n" flag of "curl" if set to True

-----Synopsis of Commits Above-----

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Status

• [x] READY
• [ ] IN-DEVELOPMENT
• [ ] ON-HOLD

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• [x] Check if documentation updates
• [x] Check if example code updates
• [x] Pylint static analysis tests are passing above 9.0/10.0
• [x] Unit tests added for any new functions/features and passed.
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[rajeevkallur]

will take a look

[rajeevkallur]

Need to evaluate.