By Padraic Halpin and Laila Bassam DUBLIN/BEIRUT (Reuters) -An Irish soldier was shot and killed on a U.N. peacekeeping mission in Lebanon and a second was in a critical condition after a hostile crowd surrounded their armoured vehicle, Ireland’s defence minister said on Thursday. The soldiers, part of the United Nations Interim Forces in Lebanon (UNIFIL), were on what Simon Coveney, who is also Ireland’s foreign minister, said was considered a standard run from UNIFIL’s area of operations in south Lebanon to Beirut when the incident happened in Al-Aqbieh late on Wednesday. “The two armoured v…