Net::Frame::Simple has a long dependency chain, avoid porting, skip tests

Index: t/102-discover-offer-request-ack.t
--- t/102-discover-offer-request-ack.t.orig
+++ t/102-discover-offer-request-ack.t
@@ -5,6 +5,8 @@ use Test::More tests => 6;
 use Test::Warn qw( warning_like );
 use FindBin ();
 
+use Test::Requires qw(Net::Frame::Simple);
+
 BEGIN { use_ok('Net::DHCP::Packet'); }
 BEGIN { use_ok('Net::DHCP::Constants', ':bootp_codes', ':htype_codes', ':dhcp_message',':dhcp_hashes' ); }
 
