python3: use compatible urllib packages

python3: use compatible urllib packages

Use py2/py3 compatible functions url packages.

Python3
    from urllib.parse import parse_qs, urljoin, urlparse, urlencode
    from urllib.request import urlopen, Request
    from urllib.error import HTTPError
Python2
    from urlparse import parse_qs, urljoin, urlparse
    from urllib import urlencode
    from urllib2 import urlopen, Request, HTTPError

Signed-off-by: Kyr Shatskyy <kyrylo.shatskyy@suse.com>