Test cases unable to add plugins

[nathanwbrei]

When I attempt to add a test case such as

TEST_CASE("JanadotSetsRecordCallStackParam") {
    JApplication app;
    app.AddPlugin("janadot");
    app.AddPlugin("JTest");
    app.SetParameterValue("jana:plugin_path", "src/plugins/janadot:src/plugins/JTest");
    app.Initialize();
    REQUIRE(app.GetParameterValue<bool>("record_call_stack") == true);
}

I get an exception during plugin loading saying that dlopen can't find the symbol japp. If I attempt to load JTest first, it can't find the symbol JFactory::Summarize(JComponentSummary&)
Right now jana-unit-tests is linked against the jana2 target.
If I link it against jana2_shared_lib, the problem goes away and the test case passes. However, programs/jana is linked against the jana2 target, and obviously doesn't have the same problem. Test cases ought to pass regardless of whether they are linked against JANA2 statically or dynamically.