Rest test: don't rebuild rest war over and over again when Arquillian @D...

...eployment method is executed

The following code:
        WebArchive archive =
        ShrinkWrap.create(MavenImporter.class)
            .offline()
            .loadPomFromFile(pomFile)
            .importBuildOutput()
            .as(WebArchive.class);

internally rebuilds the rest-servlet project from source.

Now the rest-servlet artifact in the local Maven repo is used.

Also, introduced assert-j which provides very nice fluent assertion API.