Fix some issues and other minor changes

[dcentelles]

All these fixes were made months ago. I forgot to do a pull request before... Please, check all them because I'm not sure if all these changes could lead to other problems in other AquaSim modules (there are fixes made to the phy module):

• There is a call to RemoveHeader in the AquaSimRouting::Recv method and no header is attached to the the packet the first time it is sent to the routing layer. This is a problem when the size of the packet passed to AquaSimNetDevice::Send was less than the AquaSim header's size. In order to fix this, an AquaSimHeader has been attached to the packet in the AquaSimNetDevice::Send method before being sent to the lower layers. Here the AquaSimHeader::SetSize method is called passing the actual size of the packet.
• Since some fields of the AquaSimHeader and other headers could only be used to pass information between layers (these bits should not be transmitted), the actual size of the packet to be taken into account when calculating the transmission time should be the one indicated in the AquaSimHeader with the AquaSimheader::SetSize method (I'm right?). If this is the case, all layers must update this value appropriately. In addition, the transmission time should be obtained taking into account this value instead of obtaining the size of the packet by directly calling the Packet::GetSize method (see https://github.com/rmartin5/aqua-sim-ng/blob/d6ee759e07e501321a923ba3a51d1c2936642447/model/aqua-sim-signal-cache.cc#L85 and https://github.com/rmartin5/aqua-sim-ng/blob/d6ee759e07e501321a923ba3a51d1c2936642447/model/aqua-sim-phy-cmn.cc#L474).
• In AquaSimAloha::SendPkt: the Timer thrown to wait for an ACK was not correctly estimating the RTT. This caused the retransmission of the packets even though the ACKs were received (see https://github.com/rmartin5/aqua-sim-ng/blob/d6ee759e07e501321a923ba3a51d1c2936642447/model/aqua-sim-mac-aloha.cc#L241).
• Add dependency with the internet module to avoid build errors: https://github.com/dcentelles/aqua-sim-ng/commit/9621588d79c6cc388eb7ca701126f122ce7e16b1 Minor fixes:
• Reduce redundancy in energy and power attributes.
• fix AquaSimNetDevice::Send when the routing layer is disabled and add MAC callbacks (https://github.com/dcentelles/aqua-sim-ng/commit/9b7ae0183dd0d210775131a2b21196461513dd76)
• Add more trace callbacks and log messages.