[Build] Exclude examples from produced WAR

Exclude example bundles from produced web archive; this
allows the example folder to grow (e.g. in support of
framework component demonstration for WTD-518) without
influencing the size of the built archive.

pom.xml

@@ -32,6 +32,7 @@
                         **/bundle.json
                     </warSourceIncludes>
                     <warSourceExcludes>
+                        example/**/*,
                         **/test/lib/*
                     </warSourceExcludes>
                     <failOnMissingWebXml>false</failOnMissingWebXml>