Jaxrs jersey2 support (swagger-api#5058)

* [JAVA/] jaxrs/jersey2 (Issue: 4662) Made java8-date codegeneration to work with jersey2

* Ran shellscripts for  jaxrs-jersey-petstore-server and java8-petstore-jersey2  to update petstore samples

modules/swagger-codegen/src/main/resources/JavaJaxRS/libraries/jersey2/LocalDateProvider.mustache

@@ -0,0 +1,28 @@
+package {{apiPackage}};
+
+import javax.ws.rs.ext.ParamConverter;
+import javax.ws.rs.ext.ParamConverterProvider;
+import javax.ws.rs.ext.Provider;
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+import java.time.LocalDate;
+
+@Provider
+public class LocalDateProvider implements ParamConverterProvider {
+
+    public <T> ParamConverter<T> getConverter(Class<T> clazz, Type type, Annotation[] annotations) {
+        if (clazz.getName().equals(LocalDate.class.getName())) {
+            return new ParamConverter<T>() {
+                @SuppressWarnings("unchecked")
+                public T fromString(String value) {
+                    return value!=null ? (T) LocalDate.parse(value) : null;
+                }
+
+                public String toString(T bean) {
+                    return bean!=null ? bean.toString() : "";
+                }
+            };
+        }
+        return null;
+    }
+}

modules/swagger-codegen/src/main/resources/JavaJaxRS/libraries/jersey2/OffsetDateTimeProvider.mustache

@@ -0,0 +1,28 @@
+package {{apiPackage}};
+
+import javax.ws.rs.ext.ParamConverter;
+import javax.ws.rs.ext.ParamConverterProvider;
+import javax.ws.rs.ext.Provider;
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+import java.time.OffsetDateTime;
+
+@Provider
+public class OffsetDateTimeProvider implements ParamConverterProvider {
+
+    public <T> ParamConverter<T> getConverter(Class<T> clazz, Type type, Annotation[] annotations) {
+        if (clazz.getName().equals(OffsetDateTime.class.getName())) {
+            return new ParamConverter<T>() {
+                @SuppressWarnings("unchecked")
+                public T fromString(String value) {
+                    return value != null ? (T) OffsetDateTime.parse(value) : null;
+                }
+
+                public String toString(T bean) {
+                    return bean != null ? bean.toString() : "";
+                }
+            };
+        }
+        return null;
+    }
+}

samples/client/petstore/java/jersey2/hello.txt

@@ -0,0 +1 @@
+Hello world!