By Sabine Siebold BERLIN, June 15 (Reuters) - Israel expects more orders for air and missile defence systems from European countries soon, with at least one contract expected within weeks, a senior official at Israel's defence ministry said. Demand continues to soar as European nations perceive a greater threat from Russia and seek to bolster their air defences, the official said, driving interest in systems designed to counter intermediate-range ballistic missiles and short-range rockets.