Initialize libsodium when a node instance is created
Initialize libsodium when a node instance is created


Former-commit-id: 9f6296c8ff1227603eaf8bc4bd3e0c8e293d2703
exonum/exonum,exonum/exonum,alekseysidorov/exonum,exonum/exonum,alekseysidorov/exonum,exonum/exonum,alekseysidorov/exonum,alekseysidorov/exonum