sophia-integration: use Relay instead of recovery_state

src/00000000000000000000.snap

src/box/alter.cc

src/box/engine.cc

src/box/engine.h

src/box/key_def.cc

src/box/lua/call.cc

src/box/lua/index.cc

src/box/lua/space.cc

src/box/memtx_engine.cc

src/box/memtx_engine.h

src/box/memtx_hash.cc

src/box/memtx_rtree.cc

src/box/memtx_tree.cc

src/box/replication.cc

src/box/replication.h

src/box/request.cc

src/box/request.h

src/box/schema.cc

src/box/sophia_engine.cc

src/box/sophia_engine.h