By Suleiman Al-Khalidi AMMAN (Reuters) - Days before he shot dead five people in a canteen during his lunch break, Jordanian police officer Anwar Abu Zeid sent a message to friends saying he was going on a journey to "paradise or hell", friends and security sources said. Relatives described the 29-year-old police captain as pious but not an extremist", though he would wake at dawn each day to worship in the mosque in his village in rural northern Jordan.