I have had no issue running a maven war project on an embedded server for its own integration tests, but now I need to run multiple wars and test from a different project.>
Watch out, the DEPLOYABLES element is a child of plugin/configuration, NOT plugin/configuration/configuration.
The example above should be :
org.codehaus.cargo
cargo-maven2-plugin
1.2.2
...
standalone
8085
webapp1
com.test
war
http://localhost:8085/testapp/
testapp
webapp2
com.test
war
http://localhost:8085/testapp2/
testapp2
Hope that helps !