Though you mention that this switch is a layer 2. You are doing the routing for vlan 102. You have configured an IP address and assigned it to a layer 3 vlan interface. So it will by all ways do the arp resolution for all the ip addresses that fall in that subnet. why do you feel that it should learn the ip address of its own vlan interface and the default gateway?
This is not a one to one mapping. The default gateway will ocme into picture only when it has to route traffic outside of the local subnet.(in your case vlan 102) For the local subnet traffic it still has to do an arp resolution and find the respective mac address to route traffic. Even the traffic that passes between any two devices on the same network will build the ARP table.
If you do not want this to happen. Remove the ip address from the switch and then it will be a pure layer 2 switch. you can see that only mac address table will be built and no arp entries will be there.
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The switch might be saving ARPs it "hears/sees" (i.e but doesn't, itself, request) - "just in case" in needs them (especially if the management IP is on that subnet).
I got your tricky question. When a host connected in the layer 2 switch traverses or initiates traffic.... the packet or data will have the complete information of the initiator.... arp is a protocol which converts network address or ip address to mac address... i.e ip address..... rather in simple term we can say ARP is layer 2.5.... which resides in between layer 2 and layer 3.... it just uses the layer 2 encapsulation..... all you can consider here is... layer switch will not do any routing.... apart from sending the packets to the gateway defined....
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