Add test for querying Node.Meta with DNS TXT
Add test for querying Node.Meta with DNS TXT

  - Lookup TXT records using recursive lookups
  - Expect TXT record equal to value if key starts with rfc1035-
  - Expect TXT record in rfc1464 otherwise, i.e. (k=v)

ref #2709

hashicorp/consul,youhong316/consul,vamage/consul,i0rek/consul,kingland/consul,calgaryscientific/consul,kingland/consul,kingland/consul,hashicorp/consul,i0rek/consul,youhong316/consul,42wim/consul,calgaryscientific/consul,kingland/consul,kingland/consul,scalp42/consul,vamage/consul,scalp42/consul,calgaryscientific/consul,hashicorp/consul,hashicorp/consul,calgaryscientific/consul,i0rek/consul,youhong316/consul,42wim/consul,vamage/consul,youhong316/consul,scalp42/consul,i0rek/consul,youhong316/consul,42wim/consul,calgaryscientific/consul,i0rek/consul,42wim/consul,scalp42/consul,scalp42/consul,42wim/consul,vamage/consul,vamage/consul