extend org.apache.felix.karaf.testing.Helper to emit a karaf-specific execution 
environment file for pax-runner
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                 Key: FELIX-2049
                 URL: https://issues.apache.org/jira/browse/FELIX-2049
             Project: Felix
          Issue Type: Improvement
          Components: Karaf
    Affects Versions: karaf-1.4.0
            Reporter: Eoghan Glynn
             Fix For: karaf-1.4.0


I've been looking into rebasing an existing test on the new 
org.apache.felix.karaf.testing.Helper class, but I don't think it goes quite 
far enough in imposing the karaf runtime environment on pax-runner. 
Specifically, just pulling in the config.properties settings related to the 
system.packages doesn't stop pax-runner generating a system packages list with 
its own notion of what packages are appropriate for the current JRE version. 

So for Java6 we end up with problematic entries like javax.xml.ws*, 
javax.activation etc. which cause trouble for any bundles doing 
version-constrained imports of these packages (because equinox assigns "0.0" as 
the version for system packages).

What's needed, I think, is for the Helper to generate a pax-runner execution 
environment file, named say 
target/paxrunner/platform/ee/karaf/jre-1.{5|6}.profile, and containing the 
correct set of system packages for karaf (i.e. the 
org.osgi.framework.system.packages property read from the config.properties 
with the jre-1.{5|6} variable substituted in). The Helper should also set 
rawPaxRunnerOption("--ee", 
"file://./target/paxrunner/platform/ee/karaf/jre-1.{5|6}.profile") as one of 
the default options.

Feedback welcome if I'm on the wrong track with this. But if there are no 
objections, I'll go ahead and code this up & then submit a patch.

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