Fix of upload tests for lua5.3
Fix of upload tests for lua5.3

xpol/luavm,robooo/luarocks,tarantool/luarocks,xpol/luavm,xpol/luainstaller,xpol/luainstaller,keplerproject/luarocks,keplerproject/luarocks,xpol/luainstaller,xpol/luarocks,tarantool/luarocks,xpol/luavm,keplerproject/luarocks,robooo/luarocks,xpol/luavm,luarocks/luarocks,xpol/luarocks,luarocks/luarocks,robooo/luarocks,robooo/luarocks,xpol/luarocks,tarantool/luarocks,xpol/luarocks,xpol/luainstaller,keplerproject/luarocks,xpol/luavm,luarocks/luarocks