'response-headers' = 'STANDARD' behaves like NONE

[Ion Vasilachi]

The 'response-headers' = 'STANDARD' is ignored by RateLimitPreFilter.

This issue was introduced in 10d2a51

spring-cloud-zuul-ratelimit/spring-cloud-zuul-ratelimit-core/src/main/java/com/marcosbarbero/cloud/autoconfigure/zuul/ratelimit/filters/RateLimitPreFilter.java

Line 110 in f7ed68b

 if (VERBOSE.equals(properties.getResponseHeaders())) { 

To Reproduce
Steps to reproduce the behavior:

1. Set 'response-headers' = 'STANDARD' in application.yml
2. Make a request to cause 429 TO MANY REQUEST
3. Check response headers

Expected behavior
Response headers should be returned and should contain only standard values (#282)

Actual behavior
Response headers are missing (behaves like 'response-headers' = 'NONE')

Environment & Versioning (please complete the following information):

• Spring Boot Version: 2.3.3.RELEASE
• Spring Cloud Version: Hoxton.SR7
• Spring Cloud Rate Limit Version: 2.4.1.RELEASE

Solution
Change the if statement to if (!NONE.equals(properties.getResponseHeaders())) {