Tests: fix config creation error handling
Tests: fix config creation error handling

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