[201911] fast-reboot fail on fast-reboot-dump.py script

[prsunny]

Description

fast-reboot-dump.py script failed with exception

May 20 17:23:39.124041 str-msn2700-22 INFO fast-reboot-dump: Neighbor entry: [Vlan: Vlan1000, Mac: 72:06:00:01:04:30, Ip: 192.168.1.176]
May 20 17:23:39.285529 str-msn2700-22 ERR fast-reboot-dump: Got an exception '192.168.1.210' does not appear to be an IPv4 or IPv6 interface: Traceback: Traceback (most recent call last):#012 
File "/usr/bin/fast-reboot-dump.py",line 340,in <module>#012    res = main()#012  
File "/usr/bin/fast-reboot-dump.py",line 333,in main#012    send_garp_nd(neighbor_entries,map_mac_ip_per_vlan)#012  
File "/usr/bin/fast-reboot-dump.py", line 277, in send_garp_nd#012    if ipaddress.ip_interface(dst_ip).ip.version == 4:#012  
File "/usr/local/lib/python2.7/dist-packages/ipaddress.py", line 239, in ip_interface#012    address)#012ValueError: '192.168.1.210' does not appear to be an IPv4 or IPv6 interface
May 20 17:23:39.291055 str-msn2700-22 NOTICE admin: fast-reboot failure (0) cleanup ...

This was introduced by PR sonic-net/sonic-utilities#1047 while cherry-picked to 201911
Fix provided in - sonic-net/sonic-utilities#1627

Steps to reproduce the issue:

1. Run fast-reboot command

Describe the results you received:

fast-reboot failed with exception

Describe the results you expected:

Pass

Output of show version:

SONiC.20191130.70 and above

Output of show techsupport:

(paste your output here or download and attach the file here )

Additional information you deem important (e.g. issue happens only occasionally):

[prsunny]

@rlhui , @sumukhatv for viz

[qiluo-msft]

Is the issue closed by sonic-net/sonic-utilities#1627?

[prsunny]

Is the issue closed by Azure/sonic-utilities#1627?

Yes