Rule Engine: Change level for rule parsing log (#4262)

Author: And1sS

extra/modules/pb-rule-engine/src/main/java/org/prebid/server/hooks/modules/rule/engine/core/config/RuleParser.java

@@ -90,7 +90,7 @@ private void parseConfig(String accountId, ObjectNode config) {
 
         // reference equality used on purpose - if references are equal - then we should parse
         if (attempt.timestamp() == now) {
-            logger.info("Parsing rule for account {}", accountId);
+            logger.debug("Parsing rule for account {}", accountId);
             vertx.executeBlocking(() -> parser.parse(config))
                     .onSuccess(result -> succeedParsingAttempt(accountId, result))
                     .onFailure(error -> failParsingAttempt(accountId, attempt, error));