No LLDP TTL information saved in appDB

[GarrickHe]

There is no neighbor TTL information stored in appDB. We should be able to get this information via appDB rather than using show lldp neighbor which checks the kernel

admin@sonic:~$ redis-cli
127.0.0.1:6379> KEYS "*LLDP*"
1) "LLDP_ENTRY_TABLE:Ethernet0"
2) "LLDP_ENTRY_TABLE:eth0"
3) "LLDP_LOC_CHASSIS"

127.0.0.1:6379> HGETALL "LLDP_ENTRY_TABLE:Ethernet0"
 1) "lldp_rem_chassis_id_subtype"
 2) "4"
 3) "lldp_rem_sys_name"
 4) "OS10"
 5) "lldp_rem_index"
 6) "2"
 7) "lldp_rem_port_desc"
 8) "ethernet1/1/1:1"
 9) "lldp_rem_sys_cap_supported"
10) "68 00"
11) "lldp_rem_sys_desc"
12) "Dell EMC Networking OS10 Enterprise.\r\nCopyright (c) 1999-2019 by Dell Inc. All Rights Reserved.\r\nSystem Description: OS10 Enterprise.\r\nOS Version: 10.4.9999EX.\r\nSystem Type: Z9100-ON"
13) "lldp_rem_port_id_subtype"
14) "5"
15) "lldp_rem_sys_cap_enabled"
16) "68 00"
17) "lldp_rem_chassis_id"
18) "34:17:eb:2c:d7:00"
19) "lldp_rem_port_id"
20) "ethernet1/1/1:1"
21) "lldp_rem_man_addr"
22) ""
23) "lldp_rem_time_mark"
24) "178301"
127.0.0.1:6379> exit