Trigger Alerts CIM on DHCP SNOOPING, IP_SOURCE_GUARD and ARP Inspection

[inspired]

When we get these, evaluate if we should trigger an Alert

%DHCP_SNOOPING-5-DHCP_SNOOPING_UNTRUSTED_PORT (x1): [char] drop message
on untrusted port message type: [char] MAC sa: [mac-addr]

Explanation: The DHCP snooping feature discovered certain types of DHCP messages
not allowed on the untrusted interface, indicating some host may be trying to act
as a DHCP server. The packet will be dropped.

Recommended Action: This is an informational message only. No action is required.

Also for:

"IP_SOURCE_GUARD","4","DENY_INVALID_PACKET","Detected and dropped illegal traffic on port [char] and vlan [dec] the non-cumulative packet dropped count is [dec].","IP Source Guard only permits traffic wi

[inspired]

Samplelogs added for eventgen