Fix #399: Split box.info to app and db parts

src/box/lua/info.cc

src/lua/console.lua

src/lua/init.cc

src/lua/init.lua

src/lua/log.lua

test/app/info.result

test/app/info.test.lua

test/app/logger.result

test/app/logger.test.lua

test/box/admin.result

test/box/admin.test.lua

test/box/info.result

test/box/info.test.lua

test/box/xlog.test.py