java.time.Period not updated via UpdateApi

[zdenek-jonas]

This happens only when Period is used as the root object. In practice, using such a value as the storage root is unrealistic and makes no practical sense.

java.time.Period is not updated via Eclipse Store update api.

Not working scenario:

    @Test
    void periodUpdateApiBehavior()
    {
        Period p = Period.ofYears(2).withMonths(3).withDays(5);

        try (EmbeddedStorageManager storageManager = EmbeddedStorage.start(p, tempDir)) {
        }

        Period p2 = Period.ZERO;
        try (EmbeddedStorageManager storageManager = EmbeddedStorage.start(p2, tempDir)) {

            assertEquals(p, p2, "Period should be equal after storing and reloading");
        }
    }

result:

org.opentest4j.AssertionFailedError: Period should be equal after storing and reloading ==> 
Expected :P2Y3M5D
Actual   :P0D

Working scenario:

    @Test
    void periodStoreAndReload()
    {
        Period p = Period.ofYears(2).withMonths(3).withDays(5);

        try (EmbeddedStorageManager storageManager = EmbeddedStorage.start(p, tempDir)) {
        }

        try (EmbeddedStorageManager storageManager = EmbeddedStorage.start(tempDir)) {
            Period loaded = (Period) storageManager.root();

            assertEquals(p, loaded, "Period should be equal after storing and reloading");
        }
    }