build: exclude AppShellConfiguratorImpl class from demo-jar

pom.xml

@@ -457,6 +457,7 @@
 										<exclude>**/it/*</exclude>
 										<exclude>**/DemoView.class</exclude>
 										<exclude>**/DemoLayout.class</exclude>
+										<exclude>**/AppShellConfiguratorImpl.class</exclude>
 									</excludes>
 								</configuration>
 							</execution>