PP-7211 refactor settled date search

- refactor settled date search validation and parsing to use
  pay-java-commons DateTimeUtils

Author: SandorArpa

src/main/java/uk/gov/pay/ledger/transaction/search/common/TransactionSearchParams.java

@@ -20,6 +20,7 @@
 
 import static java.time.ZoneOffset.UTC;
 import static org.apache.commons.lang3.StringUtils.isNotBlank;
+import static uk.gov.pay.commons.validation.DateTimeUtils.fromLocalDateOnlyString;
 
 public class TransactionSearchParams extends SearchParams {
 
@@ -493,10 +494,10 @@ public void setGatewayTransactionId(String gatewayTransactionId) {
     }
 
     private ZonedDateTime parseFromSettledDate() {
-        return LocalDate.parse(fromSettledDate, DATE_TIME_FORMATTER).atStartOfDay().atZone(UTC);
+        return fromLocalDateOnlyString(fromSettledDate).get();
     }
 
     private ZonedDateTime parseToSettledDate() {
-        return LocalDate.parse(toSettledDate, DATE_TIME_FORMATTER).plusDays(1L).atStartOfDay().atZone(UTC);
+        return fromLocalDateOnlyString(toSettledDate).get().plusDays(1L);
     }
 }

src/main/java/uk/gov/pay/ledger/transaction/search/common/TransactionSearchParamsValidator.java

@@ -1,11 +1,11 @@
 package uk.gov.pay.ledger.transaction.search.common;
 
+import uk.gov.pay.commons.validation.DateTimeUtils;
 import uk.gov.pay.ledger.exception.UnparsableDateException;
 import uk.gov.pay.ledger.exception.ValidationException;
 import uk.gov.pay.ledger.util.CommaDelimitedSetParameter;
 
 import java.time.ZonedDateTime;
-import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeParseException;
 
 import static org.apache.commons.lang3.StringUtils.isNotBlank;
@@ -56,9 +56,7 @@ private static void validateDate(String fieldName, String dateToParse) {
     }
 
     private static void validSettledDate(String fieldName, String settledDateToParse) {
-        try {
-            DateTimeFormatter.ofPattern("yyyy-MM-dd").parse(settledDateToParse);
-        } catch (DateTimeParseException e) {
+        if (!DateTimeUtils.fromLocalDateOnlyString(settledDateToParse).isPresent()) {
             throw new UnparsableDateException(fieldName, settledDateToParse);
         }
     }