Fix parsing of "pjsip show srv_lookups" asterisk command in "dns_records" ubus method, REF 15305
Fix the issue described in https://project.iopsys.eu/issues/15305#note-17 : 1) Weight and priority has been mixed up, in the DNS lookup priority is set, but when dumping FQDNServer it is translated into weight. 2) The "Domain" name is defined as follows in TR104i2, "The domain name of the target host". In the competitors dmcli dump, the value of the FQDN that maps to the IP is listed, in our case it is always the SIP domain, name (which is the same everywhere), relevant MRs asterisk!272 (merged) tr104!138 (merged)