Pluggable MavenArtifactUtil

WildFly Swarm uses the <artifact> feature of module.xml, and also provides a way to resolve a listed artifact from a maven repository within the uberjar -swarm.jar.

Currently, we copy/paste/modify MavenArtifactUtil.java.

https://github.com/wildfly-swarm/wildfly-swarm/blob/master/bootstrap/src/main/java/org/jboss/modules/MavenArtifactUtil.java#L293-L324

Ideally, it would be nice if the artifact resolution bits of MavenArtifactUtil was some sort of ordered list of Things To Try.

In some cases, we would like -swarm.jar applications to resolve only from the embedded m2repo/, not going online or checking the user's M2_REPO. This would help us test to ensure that we did indeed fully populate the internal m2repo/ correctly.

So, a List<ResolutionStrategy> used by MavenArtifactUtil would be lovely.