Resources array isn't cloned for extending configuration groups

[dkl-ppi]

Having a buster configuration like that:

var config = module.exports;

config["base"] = {
};

config["test group 1"] = {
        extends: "base",
        environment: "browser",
        testbed: "test/testbed1.html"
};

config["test group 2"] = {
        extends: "base",
        environment: "browser",
        testbed: "test/testbed2.html"
};

leads to the following error running tests via buster-test:

Resource can only have one of content, file, backend, combine

[dkl-ppi]

Fixed by 80ee2ff68c

[dkl-ppi]

Released with version 0.7.4 of buster-configuration