removed jakarta imports (#524)

Signed-off-by: David Kral <david.k.kral@oracle.com>

src/test/java/org/eclipse/yasson/serializers/model/AbstractJsonbSerializer.java

diff --git a/src/test/java/org/eclipse/yasson/serializers/model/AbstractJsonbSerializer.java b/src/test/java/org/eclipse/yasson/serializers/model/AbstractJsonbSerializer.java
index 1224bfa..d98e325 100644
--- a/src/test/java/org/eclipse/yasson/serializers/model/AbstractJsonbSerializer.java
+++ b/src/test/java/org/eclipse/yasson/serializers/model/AbstractJsonbSerializer.java
@@ -12,11 +12,11 @@
 
 package org.eclipse.yasson.serializers.model;
 
-import jakarta.json.Json;
-import jakarta.json.JsonStructure;
-import jakarta.json.bind.serializer.JsonbSerializer;
-import jakarta.json.bind.serializer.SerializationContext;
-import jakarta.json.stream.JsonGenerator;
+import javax.json.Json;
+import javax.json.JsonStructure;
+import javax.json.bind.serializer.JsonbSerializer;
+import javax.json.bind.serializer.SerializationContext;
+import javax.json.stream.JsonGenerator;
 
 /**
  * Abstract serializer.

src/test/java/org/eclipse/yasson/serializers/model/ExplicitJsonbSerializer.java

diff --git a/src/test/java/org/eclipse/yasson/serializers/model/ExplicitJsonbSerializer.java b/src/test/java/org/eclipse/yasson/serializers/model/ExplicitJsonbSerializer.java
index 296dfd7..b6834c8 100644
--- a/src/test/java/org/eclipse/yasson/serializers/model/ExplicitJsonbSerializer.java
+++ b/src/test/java/org/eclipse/yasson/serializers/model/ExplicitJsonbSerializer.java
@@ -12,7 +12,7 @@
 
 package org.eclipse.yasson.serializers.model;
 
-import jakarta.json.bind.serializer.JsonbSerializer;
+import javax.json.bind.serializer.JsonbSerializer;
 
 /**
  * Explicit serializer.