[sonic-cfggen] Fix init t1 config to align with YANG (sonic-net#21195)

Why I did it
Improve the t1 config to align with YANG validation

How I did it
Add missing leafref and mandatory field to the config

How to verify it
YANG validation check on generated config

Author: wen587

src/sonic-config-engine/config_samples.py

@@ -50,7 +50,8 @@ def generate_t1_sample_config(data):
     data['DEVICE_METADATA']['localhost']['hostname'] = 'sonic'
     data['DEVICE_METADATA']['localhost']['type'] = 'LeafRouter'
     data['DEVICE_METADATA']['localhost']['bgp_asn'] = '65100'
-    data['LOOPBACK_INTERFACE'] = {"Loopback0|10.1.0.1/32": {}}
+    data['LOOPBACK_INTERFACE'] = {"Loopback0": {},
+                                  "Loopback0|10.1.0.1/32": {}}
     data['BGP_NEIGHBOR'] = {}
     data['DEVICE_NEIGHBOR'] = {}
     data['INTERFACE'] = {}
@@ -63,6 +64,7 @@ def generate_t1_sample_config(data):
         peer_addr = '10.0.{}.{}'.format(2 * port_count // 256, 2 * port_count % 256 + 1)
         peer_name='ARISTA{0:02d}{1}'.format(1+port_count%(total_port_amount // 2), 'T2' if port_count < (total_port_amount // 2) else 'T0')
         peer_asn = 65200 if port_count < (total_port_amount // 2) else 64001 + port_count - (total_port_amount // 2)
+        data['INTERFACE']['{}'.format(port)] = {}
         data['INTERFACE']['{}|{}/31'.format(port, local_addr)] = {}
         data['BGP_NEIGHBOR'][peer_addr] = {
                 'rrclient': 0,
@@ -185,7 +187,7 @@ def generate_global_dualtor_tables():
     data = defaultdict(lambda: defaultdict(dict))
     data['LOOPBACK_INTERFACE'] = {
                                     'Loopback2': {},
-                                    'Loopback2|3.3.3.3': {}
+                                    'Loopback2|3.3.3.3/32': {}
                                     }
     data['MUX_CABLE'] = {}
     data['PEER_SWITCH'] = {

src/sonic-config-engine/tests/sample_output/py2/l2switch_dualtor.json

@@ -520,7 +520,7 @@
     },
     "LOOPBACK_INTERFACE": {
         "Loopback2": {},
-        "Loopback2|3.3.3.3": {}
+        "Loopback2|3.3.3.3/32": {}
     },
     "MUX_CABLE": {
         "Ethernet0": {

src/sonic-config-engine/tests/sample_output/py3/l2switch_dualtor.json

@@ -520,7 +520,7 @@
     },
     "LOOPBACK_INTERFACE": {
         "Loopback2": {},
-        "Loopback2|3.3.3.3": {}
+        "Loopback2|3.3.3.3/32": {}
     },
     "MUX_CABLE": {
         "Ethernet0": {

src/sonic-config-engine/tests/sample_output/t1-smartswitch.json

@@ -375,6 +375,38 @@
 		}
 	},
 	"INTERFACE": {
+		"Ethernet0":{},
+		"Ethernet104": {},
+		"Ethernet112": {},
+		"Ethernet120": {},
+		"Ethernet128": {},
+		"Ethernet136": {},
+		"Ethernet144": {},
+		"Ethernet152": {},
+		"Ethernet160": {},
+		"Ethernet168": {},
+		"Ethernet16": {},
+		"Ethernet176": {},
+		"Ethernet184": {},
+		"Ethernet192": {},
+		"Ethernet200": {},
+		"Ethernet208": {},
+		"Ethernet216": {},
+		"Ethernet224": {},
+		"Ethernet232": {},
+		"Ethernet240": {},
+		"Ethernet248": {},
+		"Ethernet24": {},
+		"Ethernet32": {},
+		"Ethernet40": {},
+		"Ethernet48": {},
+		"Ethernet56": {},
+		"Ethernet64": {},
+		"Ethernet72": {},
+		"Ethernet80": {},
+		"Ethernet88": {},
+		"Ethernet8": {},
+		"Ethernet96": {},
 		"Ethernet0|10.0.0.0/31": {},
 		"Ethernet104|10.0.0.26/31": {},
 		"Ethernet112|10.0.0.28/31": {},
@@ -409,6 +441,7 @@
 		"Ethernet96|10.0.0.24/31": {}
 	},
 	"LOOPBACK_INTERFACE": {
+		"Loopback0": {},
 		"Loopback0|10.1.0.1/32": {}
 	},
 	"MID_PLANE_BRIDGE": {
@@ -611,4 +644,4 @@
 			"mtu": "9100"
 		}
 	}
-}
+}