Tests: Support testing the USGen privacy module (#3722)

* Add functional tests for GPP USNat v2

src/test/groovy/org/prebid/server/functional/model/config/AccountGppConfig.groovy

@@ -8,5 +8,6 @@ class AccountGppConfig {
 
     PrivacyModule code
     Boolean enabled
+    Integer skipRate
     GppModuleConfig config
 }

src/test/groovy/org/prebid/server/functional/model/response/auction/ActivityInfrastructure.groovy

@@ -17,7 +17,7 @@ class ActivityInfrastructure {
     RuleConfiguration ruleConfiguration
     Boolean allowByDefault
     Boolean allowed
-    String result
+    RuleResult result
     String region
     String country
 }

src/test/groovy/org/prebid/server/functional/model/response/auction/And.groovy

@@ -1,11 +1,18 @@
 package org.prebid.server.functional.model.response.auction
 
+import com.fasterxml.jackson.databind.PropertyNamingStrategies
+import com.fasterxml.jackson.databind.annotation.JsonNaming
 import groovy.transform.EqualsAndHashCode
 import groovy.transform.ToString
+import org.prebid.server.functional.model.request.auction.PrivacyModule
 
 @ToString(includeNames = true, ignoreNulls = true)
 @EqualsAndHashCode
+@JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy)
 class And {
 
     List<String> and
+    PrivacyModule privacyModule
+    Boolean skipped
+    RuleResult result
 }

src/test/groovy/org/prebid/server/functional/model/response/auction/RuleResult.groovy

@@ -0,0 +1,6 @@
+package org.prebid.server.functional.model.response.auction
+
+enum RuleResult {
+
+    ALLOW, DISALLOW, ABSTAIN
+}