Add verify_eigrp_interfaces_timers API to verify.py ios/iosxe eigrp protocol (my previous contribution) supporting EIGRPv4 and EIGRPv6 for IOS/IOSXE

Add verify_eigrp_interfaces_timers API to verify.py ios/iosxe eigrp protocol (my previous contribution) supporting EIGRPv4 and EIGRPv6 for IOS/IOSXE #376