Fix copyright/license headers in microprofile-reactive-messaging-amqp-connector-example

[bstansberry]

Any header other than the current standard WildFly ones should be removed or replaced.

For example:

https://github.com/wildfly-extras/guides/blob/main/microprofile-reactive-messaging-amqp-connector-example/src/main/webapp/WEB-INF/beans.xml