Fix creation of ICMP security group rule when using Neutron

Update ICMP allow rule to use the value -1 for to_port and
from_port parameters as ICMP protocol does not have port.

Change-Id: Idc76e156f07b99574b6b77dba803d5a4f823380b
Closes-bug: #1336704
Merge "Fix creation of ICMP security group rule when using Neutron"