Split look_for_lua_install in install.bat
Split look_for_lua_install in install.bat

Move gathering of potential lua directories into
a separate function, call it only when needed.

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