MDEPLOY-226: DeployAtEnd fails when module has extension

[chonton]

MDEPLOY-225: DeployAtEnd fails when overriding skip
MDEPLOY-224: Overriding deployAtEnd fails

[jdileonardo]

@chonton @tbroyer

I believe this solved the problem i was having with using https://github.com/tbroyer/gwt-maven-plugin

Any of my submodules using the plugin would not register with the deploy "count", and i'd end up short when doing the final comparison.

@khmarbaise

What's the timeframe to get this merged?

[robseidel]

The serialisation needs to be updated with XMLEncoder/XMLDecoder or else surefire/failsafe will fail as it reads all properties and expects String - see apache/maven-deploy-plugin#1

[chonton]

XMLEncoder/XMLDecoder will not work on the MavenProject member. Xpp3 has similar problems.
I believe this approach is not going to work without support from core or update to Surefire/Failsafe.