Revert "Normalize ZoneId objects before serializing them"

Undo this bug fix for 1.X because the 1.0 TCK requires the
opposite behavior currently.

This reverts commit edbcff85962ef43ac0293ba7fef154843f46ffb7.

src/main/java/org/eclipse/yasson/internal/serializer/ZoneIdTypeSerializer.java

diff --git a/src/main/java/org/eclipse/yasson/internal/serializer/ZoneIdTypeSerializer.java b/src/main/java/org/eclipse/yasson/internal/serializer/ZoneIdTypeSerializer.java
index 7443d5a..1d4ba39 100644
--- a/src/main/java/org/eclipse/yasson/internal/serializer/ZoneIdTypeSerializer.java
+++ b/src/main/java/org/eclipse/yasson/internal/serializer/ZoneIdTypeSerializer.java
@@ -35,6 +35,6 @@
 
     @Override
     protected void serialize(ZoneId obj, JsonGenerator generator, Marshaller marshaller) {
-        generator.write(obj.normalized().getId());
+        generator.write(obj.getId());
     }
 }

src/test/java/org/eclipse/yasson/defaultmapping/dates/DatesTest.java

diff --git a/src/test/java/org/eclipse/yasson/defaultmapping/dates/DatesTest.java b/src/test/java/org/eclipse/yasson/defaultmapping/dates/DatesTest.java
index 6cdca20..9a2211a 100644
--- a/src/test/java/org/eclipse/yasson/defaultmapping/dates/DatesTest.java
+++ b/src/test/java/org/eclipse/yasson/defaultmapping/dates/DatesTest.java
@@ -416,7 +416,6 @@
     @Test
     public void testMarshalZoneId() {
         assertEquals("{\"value\":\"Europe/Prague\"}", bindingJsonb.toJson(new ScalarValueWrapper<>(ZoneId.of("Europe/Prague"))));
-        assertEquals("\"Z\"", bindingJsonb.toJson(ZoneId.of("UTC")));  // Issue #387
     }
 
     @Test