[bgp]: Enable bgp soft-reconfiguration inbound for quagga templates (#1803)

* Enable bgp soft-reconfiguration inbound for quagga templates

Author: pavel-shirshov

dockers/docker-fpm-quagga/bgpd.conf.j2

@@ -78,6 +78,7 @@ router bgp {{ DEVICE_METADATA['localhost']['bgp_asn'] }}
     neighbor {{ neighbor_addr }} allowas-in 1
 {% endif %}
     neighbor {{ neighbor_addr }} activate
+    neighbor {{ neighbor_addr }} soft-reconfiguration inbound
     maximum-paths 64
   exit-address-family
 {% endif %}
@@ -87,6 +88,7 @@ router bgp {{ DEVICE_METADATA['localhost']['bgp_asn'] }}
     neighbor {{ neighbor_addr }} allowas-in 1
 {% endif %}
     neighbor {{ neighbor_addr }} activate
+    neighbor {{ neighbor_addr }} soft-reconfiguration inbound
     maximum-paths 64
   exit-address-family
 {% endif %}

src/sonic-config-engine/tests/sample_output/bgpd.conf

@@ -32,55 +32,63 @@ router bgp 65100
   address-family ipv4
     neighbor 10.0.0.57 allowas-in 1
     neighbor 10.0.0.57 activate
+    neighbor 10.0.0.57 soft-reconfiguration inbound
     maximum-paths 64
   exit-address-family
   neighbor 10.0.0.59 remote-as 64600
   neighbor 10.0.0.59 description ARISTA02T1
   address-family ipv4
     neighbor 10.0.0.59 allowas-in 1
     neighbor 10.0.0.59 activate
+    neighbor 10.0.0.59 soft-reconfiguration inbound
     maximum-paths 64
   exit-address-family
   neighbor 10.0.0.61 remote-as 64600
   neighbor 10.0.0.61 description ARISTA03T1
   address-family ipv4
     neighbor 10.0.0.61 allowas-in 1
     neighbor 10.0.0.61 activate
+    neighbor 10.0.0.61 soft-reconfiguration inbound
     maximum-paths 64
   exit-address-family
   neighbor 10.0.0.63 remote-as 64600
   neighbor 10.0.0.63 description ARISTA04T1
   address-family ipv4
     neighbor 10.0.0.63 allowas-in 1
     neighbor 10.0.0.63 activate
+    neighbor 10.0.0.63 soft-reconfiguration inbound
     maximum-paths 64
   exit-address-family
   neighbor fc00::7a remote-as 64600
   neighbor fc00::7a description ARISTA03T1
   address-family ipv6
     neighbor fc00::7a allowas-in 1
     neighbor fc00::7a activate
+    neighbor fc00::7a soft-reconfiguration inbound
     maximum-paths 64
   exit-address-family
   neighbor fc00::7e remote-as 64600
   neighbor fc00::7e description ARISTA04T1
   address-family ipv6
     neighbor fc00::7e allowas-in 1
     neighbor fc00::7e activate
+    neighbor fc00::7e soft-reconfiguration inbound
     maximum-paths 64
   exit-address-family
   neighbor fc00::72 remote-as 64600
   neighbor fc00::72 description ARISTA01T1
   address-family ipv6
     neighbor fc00::72 allowas-in 1
     neighbor fc00::72 activate
+    neighbor fc00::72 soft-reconfiguration inbound
     maximum-paths 64
   exit-address-family
   neighbor fc00::76 remote-as 64600
   neighbor fc00::76 description ARISTA02T1
   address-family ipv6
     neighbor fc00::76 allowas-in 1
     neighbor fc00::76 activate
+    neighbor fc00::76 soft-reconfiguration inbound
     maximum-paths 64
   exit-address-family
 !