When a RemoteError is created, it is passed the complete content of the
json response from the server. Thus is can happen that it contains
unexpected entries, we should just ignore them.
Change-Id: I2155d1d44432884f19ef926c02b9d0f99ade57d9
Closes-Bug: 1714460
In the case that designate api returns an error response which
does not have an 'message' entry, CLI will prints out nothing helpful
for users. The patch grabs info from response to try to provide a helpful msg.
Fixed axfr resource too.
Change-Id: I810426b6d4f731cc5ead4372083abf6515c05dc3
