Use Year class for getting the current year.

Addressed to #493

No functional changes.

Author: php-coder

src/main/java/ru/mystamps/web/controller/SeriesController.java

@@ -18,10 +18,9 @@
 package ru.mystamps.web.controller;
 
 import java.io.IOException;
-import java.util.Calendar;
+import java.time.Year;
 import java.util.Collections;
 import java.util.Date;
-import java.util.GregorianCalendar;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -93,7 +92,7 @@
 @SuppressWarnings({ "PMD.AvoidDuplicateLiterals", "PMD.TooManyMethods", "PMD.GodClass" })
 public class SeriesController {
 
-	private static final Integer CURRENT_YEAR   = new GregorianCalendar().get(Calendar.YEAR);
+	private static final Integer CURRENT_YEAR = Integer.valueOf(Year.now().getValue());
 
 	private static final Map<Integer, Integer> YEARS;
 

src/test/java/ru/mystamps/web/tests/cases/WhenUserAddSeries.java

@@ -21,8 +21,7 @@
 
 import java.io.File;
 import java.net.URISyntaxException;
-import java.util.Calendar;
-import java.util.GregorianCalendar;
+import java.time.Year;
 import java.util.List;
 import java.util.ArrayList;
 
@@ -47,7 +46,7 @@
 public class WhenUserAddSeries extends WhenAnyUserAtAnyPageWithForm<AddSeriesPage> {
 
 	private static final int SINCE_YEAR     = 1840;
-	private static final int CURRENT_YEAR   = new GregorianCalendar().get(Calendar.YEAR);
+	private static final int CURRENT_YEAR   = Year.now().getValue();
 
 	private static final List<String> EXPECTED_YEARS =
 		new ArrayList<>(CURRENT_YEAR - SINCE_YEAR + 1);