Merge branch 'sophia-integration'

src/box/alter.cc

src/box/box.cc

src/box/engine.cc

src/box/engine.h

src/box/lua/call.cc

src/box/lua/load_cfg.lua

src/box/memtx_engine.cc

src/box/memtx_engine.h

src/box/recovery.cc

src/box/recovery.h

src/box/replication.cc

src/box/replication.h

src/box/request.h

src/box/schema.cc

src/box/sophia_engine.cc

src/box/sophia_engine.h

src/box/sophia_index.cc

src/box/sophia_index.h

src/box/space.cc

src/box/space.h