Fix querying record without rights

[laxa]

Hello, when querying DNS records, sometimes, right to list attributes of an entry is not given. In such case, dnstool.py incorrectly states the record was not found.
This PR fixes this behavior by querying all entries of the zone to identify if a record is present and the output has been modified to warn when the entry exists but not information could be extracted:

$ python3 dnstool.py -u DOMAIN\\USER -p $PASSWORD -port 389 -dc-ip 10.1.1.11 -r '*' -a query 10.1.1.11
[-] Connecting to host...
[-] Binding to host
[+] Bind OK
[+] Record found but no rights to list attributes