Bakery production packaging has the build directory in the wrong place

[johannest]

Trying Bakery Flow 14.beta2 in production mode with Tomcat IntelliJ plugin (exploded war), separate Tomcat by deploying war, and running war from command line (java -jar -Dvaadin.productionMode ...) all these fail to same annoying issue:
java.lang.IllegalArgumentException: Failed to find the bundle manifest file 'frontend://vaadin-flow-bundle-manifest.json' in the servlet context for 'ES6' browsers. If you are running a dev-mode servlet container in maven e.g. `jetty:run` change it to `jetty:run-exploded`. ...

The root cause of the issue: the build directory is placed into bakery-app-starter-flow-spring-1.0-SNAPSHOT.war\WEB-INF\classes\META-INF\resources\build but it should be placed on the root of the war file.

Workaround: modify war file such that build is in the root of the war file.