Fixes for errors seen in staging devices (sonic-net#7171)

With the latest 201911 image, the following error was seen on staging devices with TSB command ( for both single asic, multi asic ). Though this err message doesn't affect the TSB functionality, it is good to fix.

admin@STG01-0101-0102-01T1:~$ TSB
BGP0 : % Could not find route-map entry TO_TIER0_V4 20
line 1: Failure to communicate[13] to zebra, line: no route-map TO_TIER0_V4 permit 20
% Could not find route-map entry TO_TIER0_V4 30
line 2: Failure to communicate[13] to zebra, line: no route-map TO_TIER0_V4 deny 30

In addition, in this PR I am fixing the message displayed to user when there are no BGP neighbors configured on that BGP instance. In multi-asic device there could be case where there are no BGP neighbors configured on a particular ASIC.

dockers/docker-fpm-frr/TS

@@ -10,7 +10,7 @@ function check_not_installed()
 {
  c=0
  config=$(vtysh -c "show run")
- for route_map_name in $(echo "$config" | sed -ne 's/ neighbor \S* route-map \(\S*\) out/\1/p' | egrep 'V4|V6');
+ for route_map_name in $(echo "$config" | sed -ne 's/ neighbor \S* route-map \(\S*\) out/\1/p' | egrep 'V4|V6' | uniq);
  do
  is_internal_route_map $route_map_name && continue
  echo "$config" | egrep -q "^route-map $route_map_name permit 20$"
@@ -26,7 +26,7 @@ function check_installed()
  c=0
  e=0
  config=$(vtysh -c "show run")
- for route_map_name in $(echo "$config" | sed -ne 's/ neighbor \S* route-map \(\S*\) out/\1/p' | egrep 'V4|V6');
+ for route_map_name in $(echo "$config" | sed -ne 's/ neighbor \S* route-map \(\S*\) out/\1/p' | egrep 'V4|V6' | uniq);
  do
  is_internal_route_map $route_map_name && continue
  echo "$config" | egrep -q "^route-map $route_map_name permit 20$"
@@ -38,3 +38,15 @@ function check_installed()
  done
  return $((e-c))
 }
+
+function find_num_routemap()
+{
+ c=0
+ config=$(vtysh -c "show run")
+ for route_map_name in $(echo "$config" | sed -ne 's/ neighbor \S* route-map \(\S*\) out/\1/p' | egrep 'V4|V6' | uniq);
+ do
+ is_internal_route_map $route_map_name && continue
+ c=$((c+1))
+ done
+ return $c
+}

dockers/docker-fpm-frr/TSA

@@ -3,12 +3,18 @@
 # Load the common functions
 source /usr/bin/TS
 
+find_num_routemap
+routemap_count=$?
 check_not_installed
 not_installed=$?
-if [[ $not_installed -ne 0 ]];
+
+if [[ $routemap_count -eq 0 ]];
+then
+ echo "System Mode: No external neighbors"
+elif [[ $not_installed -ne 0 ]];
 then
  TSA_FILE=$(mktemp)
- for route_map_name in $(echo "$config" | sed -ne 's/ neighbor \S* route-map \(\S*\) out/\1/p');
+ for route_map_name in $(echo "$config" | sed -ne 's/ neighbor \S* route-map \(\S*\) out/\1/p' | uniq);
  do
  is_internal_route_map $route_map_name && continue
  case "$route_map_name" in

dockers/docker-fpm-frr/TSB

@@ -3,12 +3,18 @@
 # Load the common functions
 source /usr/bin/TS
 
+find_num_routemap
+routemap_count=$?
 check_installed
 installed=$?
-if [[ $installed -ne 0 ]];
+
+if [[ $routemap_count -eq 0 ]];
+then
+ echo "System Mode: No external neighbors"
+elif [[ $installed -ne 0 ]]; 
 then
  TSB_FILE=$(mktemp)
- for route_map_name in $(echo "$config" | sed -ne 's/ neighbor \S* route-map \(\S*\) out/\1/p');
+ for route_map_name in $(echo "$config" | sed -ne 's/ neighbor \S* route-map \(\S*\) out/\1/p' | uniq);
  do
  is_internal_route_map $route_map_name && continue
  case "$route_map_name" in

dockers/docker-fpm-frr/TSC

@@ -3,13 +3,18 @@
 # Load the common functions
 source /usr/bin/TS
 
+find_num_routemap
+routemap_count=$?
 check_not_installed
 not_installed=$?
 
 check_installed
 installed=$?
 
-if [[ $installed -eq 0 ]];
+if [[ $routemap_count -eq 0 ]];
+then 
+ echo "System Mode: No external neighbors"
+elif [[ $installed -eq 0 ]];
 then
  echo "System Mode: Normal"
 elif [[ $not_installed -eq 0 ]];