Make client jar OSGi symbolic name header unique

Signed-off-by: jansupol <jan.supol@oracle.com>

api/client/pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (c) 2018, 2021 Oracle and/or its affiliates and others.
+    Copyright (c) 2018, 2022 Oracle and/or its affiliates and others.
     All rights reserved.
 
     This program and the accompanying materials are made available under the
@@ -32,6 +32,11 @@
     <description>Jakarta WebSocket - Client API</description>
     <url>https://projects.eclipse.org/projects/ee4j.websocket</url>
 
+    <properties>
+        <bundle.symbolicName>jakarta.websocket-client-api</bundle.symbolicName>
+        <extensionName>jakarta.websocket-client</extensionName>
+    </properties>
+
     <build>
         <resources>
             <resource>