Get the agent IP using ip addr if ifconfig fails.

pandora_agents/unix/pandora_agent

@@ -2167,6 +2167,10 @@ while (1) {
 		if ($Conf{'address'} eq 'auto') {
 			# Tested on Ubuntu, debian, Suse, Solaris 10 and AIX 5.1
 			my @address_list = `ifconfig -a | grep -v '127.0.0' | grep '[0-9]*\\.[0-9]*\\.[0-9]*' | awk '{ print \$2 }' | awk -F':' '{ print \$2 }'`;
+			if ($#address_list < 0) {
+				# Tested on Red Hat 7
+				@address_list = `ip addr show | grep -v '127.0.0' | grep '[0-9]*\\.[0-9]*\\.[0-9]*' | awk '{print \$2}' | cut -d/ -f1`;
+			}
 			for (my $i = 0; $i <= $#address_list; $i++) {		
 				chomp($address_list[$i]);
 				if ($i > 0) {