Increasing rate limit for API user

In order to do some load testing on the infrastructure we want to
disable the rate limiting that is applied within the app.
Increasing the value to 10 millions request per min allow us to
effectively bypass the rate limiter with minimal change to the
code.

Author: roch

config/initializers/rack_attack.rb

@@ -8,13 +8,13 @@
 class Rack::Attack
   CONVERSATION_API_PATH_REGEX = /^\/api\/v\d+\/conversation/
 
-  throttle(Api::RateLimit::GOVUK_API_USER_READ_THROTTLE_NAME, limit: 10_800, period: 1.minute) do |request|
+  throttle(Api::RateLimit::GOVUK_API_USER_READ_THROTTLE_NAME, limit: 10_000_000, period: 1.minute) do |request|
     if request.path.match?(CONVERSATION_API_PATH_REGEX) && read_method?(request)
       signon_uid(request)
     end
   end
 
-  throttle(Api::RateLimit::GOVUK_API_USER_WRITE_THROTTLE_NAME, limit: 900, period: 1.minute) do |request|
+  throttle(Api::RateLimit::GOVUK_API_USER_WRITE_THROTTLE_NAME, limit: 10_000_000, period: 1.minute) do |request|
     if request.path.match?(CONVERSATION_API_PATH_REGEX) && !read_method?(request)
       signon_uid(request)
     end