-Eliminate 'use SNMP' from places to get memory consumption down

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@2899 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

perl-xCAT/xCAT/MacMap.pm

@@ -8,7 +8,6 @@ use IO::Select;
 use IO::Handle;
 use Sys::Syslog;
 use Data::Dumper;
-use SNMP; 
 my %cisco_vlans; #Special hash structure to reflect discovered VLANS on Cisco equip
 #use IF-MIB (1.3.6.1.2.1.2) for all switches
 #   1.3.6.1.2.1.31.1.1 - ifXtable
@@ -78,6 +77,12 @@ OID, and have the switch table port value match exactly the format suggested by
 
 sub new {
   my $self = {};
+  eval {
+      require SNMP; 
+  };
+  if ($@) {
+      die "SNMP support required to use MacMAP";
+  }
   my $proto = shift;
   my $class = ref($proto) || $proto;
 

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

@@ -1,10 +1,8 @@
 #!/usr/bin/env perl
 # IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
 package xCAT_plugin::nodediscover;
-#use Net::SNMP qw(:snmp INTEGER);
 use xCAT::Table;
 use IO::Socket;
-use SNMP;
 use strict;
 
 use XML::Simple;