refactor: set path of cookie.

[youngsofun]

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Summary

we used to assume client only care about name and value (ignore domain and path).
this fix is to avoid accumulation of cookies of diff paths if client enabled cookie mistakenly but not ignore path.
however, we can not set domain freely, because it will not work.

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

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 could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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This change is 

[youngsofun]

@sundy-li

1. add logic test code for this pr
2. the cookie jar for python is simplified.