Escaped double-quotes in Anvil! node descriptions when reporting usage as XML format. Should resolve issue #321.

Signed-off-by: digimer <mkelly@alteeve.ca>

tools/anvil-report-usage

@@ -277,6 +277,7 @@ sub show_anvils_machine
 	{
 		my $anvil_uuid        =  $anvil->data->{anvil_data}{$anvil_name}{anvil_uuid};
 		my $anvil_description =  $anvil->data->{anvil_data}{$anvil_name}{description};
+		   $anvil_description =~ s/"/\"/g;
 		my $cpu_cores         =  $anvil->data->{anvil_data}{$anvil_name}{cpu_cores};
 		my $cpu_threads       =  $anvil->data->{anvil_data}{$anvil_name}{cpu_threads};
 		my $ram_available     =  $anvil->data->{anvil_data}{$anvil_name}{ram_available};