Add E2E test for bias detection of guardrails

[qgao007]

Description

Add E2E test for bias detection

Issues

To meet E2E test requirement raised by Suyue

Type of change

List the type of change like below. Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• [ X] New feature (non-breaking change which adds new functionality)
• Breaking change (fix or feature that would break existing design and interface)
• Others (enhancement, documentation, validation, etc.)

Dependencies

No.

Tests

ran the E2E test and validated the result to be correct.

Validate microservice started
+ echo 'test 1 - biased'
__test 1 - biased__
++ curl localhost:9092/v1/bias -X POST -d '{"text":"**John McCain exposed as an unprincipled politician.**"}' -H 'Content-Type: application/json'
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   192  100   131  100    61     31     14  0:00:04  0:00:04 --:--:--    45
+ result='{"downstream_black_list":[".*"],"id":"5b500c5a26b3a86c4d6285961b8788df","text":"Violated policies: bias, please check your input."}'
+ [[ {"downstream_black_list":[".*"],"id":"5b500c5a26b3a86c4d6285961b8788df","text":"Violated policies: bias, please check your input."} == *\V\i\o\l\a\t\e\d* ]]
+ echo 'Result correct.'
**Result correct.**
+ echo 'test 2 - non-biased'
test 2 - non-biased
++ curl localhost:9092/v1/bias -X POST -d '{"text":"**John McCain described as an unprincipled politician."**}' -H 'Content-Type: application/json'
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   193  100   130  100    63  11818   5727 --:--:-- --:--:-- --:--:-- 17545
+ result='{"downstream_black_list":[],"id":"3cf2a36b5f424dfdb9223d49aca62037","text":"John McCain described as an unprincipled politician."}'
+ [[ {"downstream_black_list":[],"id":"3cf2a36b5f424dfdb9223d49aca62037","text":"John McCain described as an unprincipled politician."} == *\d\e\s\c\r\i\b\e\d* ]]
+ echo 'Result correct.'
**Result correct.**
**+ echo 'Validate microservice completed'**

[qgao007]

@chensuyue Added and validated E2E test for bias detection.

[ashahba]

LGTM!