Function install_thread

test/test_snapshot_executor.cpp:262–268

};

void* install_thread(void* arg) {
    InstallArg* ia = (InstallArg*)arg;
    ia->e->install_snapshot(
            &ia->cntl, &ia->request, &ia->response, &ia->done);
    ia->done.wait();
    return NULL;
}

TEST_F(SnapshotExecutorTest, retry_request) {
    MockFSMCaller fsm_caller;