replace inet_ntoa with IPv4/IPv6 compatible subroutine

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@5981 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/lib/xcat/plugins/xcat2nim.pm

@@ -1548,7 +1548,7 @@ sub mkNIMnetwork
 			}
 
 			# get the ip of the nim primary interface
-			my $gwIP = inet_ntoa(inet_aton($adapterhost));
+			my $gwIP = xCAT::Utils->getipaddr($adapterhost);
 			chomp $gwIP;
 
 			# create static routes between the networks