update the kim_init command test

{

    if (!LAMMPS::is_installed_pkg("KIM")) GTEST_SKIP();

    TEST_FAILURE(".*ERROR: Illegal kim_init command.*",

                 lmp->input->one("kim_init"););

    TEST_FAILURE(".*ERROR: Illegal kim_init command.*",

                 lmp->input->one("kim_init LennardJones_Ar real si"););

    TEST_FAILURE(".*ERROR: LAMMPS unit_style lj not supported by KIM models.*",

                 lmp->input->one("kim_init LennardJones_Ar lj"););

    TEST_FAILURE(".*ERROR: Unknown unit_style.*",

                 lmp->input->one("kim_init LennardJones_Ar new_style"););

    TEST_FAILURE(".*ERROR: KIM Model name not found.*",

                 lmp->input->one("kim_init Unknown_Model real"););

    TEST_FAILURE(".*ERROR: Incompatible units for KIM Simulator Model, required units = metal.*",

                 lmp->input->one("kim_init Sim_LAMMPS_LJcut_AkersonElliott_Alchemy_PbAu real"););

    ::testing::internal::CaptureStdout();

    lmp->input->one("kim_init LennardJones_Ar real");

    ::testing::internal::GetCapturedStdout();

    int ifix = lmp->modify->find_fix("KIM_MODEL_STORE");

    ASSERT_GE(ifix, 0);

    TEST_FAILURE(".*ERROR: Illegal kim_init command.*", lmp->input->one("kim_init"););

    TEST_FAILURE(".*ERROR: KIM Model name not found.*",

                 lmp->input->one("kim_init Unknown_Model real"););

}

TEST_F(KimCommandsTest, kim_interactions_ar)