Update faucet_url processing logic

[ckeshava]

High Level Overview of Change

This PR seeks to address #364

This is an alternative approach competing with #676
PR #676 needs to be closed after this PR is reviewed and merged.

Context of Change

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking change that only restructures code)
• Tests (You added tests for code that already exists, or your new feature included in this PR)
• Documentation Updates
• Release

Did you update CHANGELOG.md?

• Yes
• No, this change does not impact library users
  This PR improves the handling of the faucet URL. I'm not sure if it needs to be included in the CHANGELOG. The changes are intuitive.

Test Plan

Some unit tests have been added to validate this change.

Many thanks to @justinr1234 for coming up with the design and code for this solution

[jonathanlei]

approved

[jonathanlei]

LGTM