Fix #733: Space name in duplicate key error

src/box/errcode.h

src/box/memtx_hash.cc

src/box/memtx_tree.cc

src/box/sophia_index.cc

src/box/space.cc

test/big/hash.result

test/big/hash_multipart.result

test/big/lua.result

test/big/tree_pk.result

test/big/tree_pk_multipart.result

test/box/alter.result

test/box/alter_limits.result

test/box/call.result

test/box/fiber.result

test/box/misc.result

test/box/net.box.result

test/box/update.result

test/replication/cluster.result

test/sophia/gh.result