nxos using nx-api ping unable to handle no route to host message

[ktbyers]

This test:

nxos1# ping google.com
PING google.com (172.217.7.238): 56 data bytes
ping: sendto google.com 64 chars, No route to host
Request 0 timed out
ping: sendto google.com 64 chars, No route to host
Request 1 timed out
ping: sendto google.com 64 chars, No route to host
Request 2 timed out
ping: sendto google.com 64 chars, No route to host
Request 3 timed out
ping: sendto google.com 64 chars, No route to host
Request 4 timed out

--- google.com ping statistics ---
5 packets transmitted, 0 packets received, 100.00% packet loss

Resulted in an empty dictionary being returned.

[ktbyers]

There is also no unit test data for the ping method for NX-API for any of the failure cases (the normal test case only handles a ping success).