replace tenant to person_1 in examples and required of API Json

docs/api/DLUHC-CORE-Data.v1.json

@@ -109,7 +109,7 @@
                   "Invalid Age": {
                     "value": {
                       "errors": {
-                        "tenant_age": [
+                        "person_1_age": [
                           "Tenant age must be between 0 and 120"
                         ]
                       }
@@ -219,7 +219,7 @@
                         "reasonable_preference_reason": [
                           "If reasonable preference is Yes, a reason must be given"
                         ],
-                        "tenant_age": [
+                        "person_1_age": [
                           "Tenant age must be between 0 and 120"
                         ]
                       }
@@ -268,8 +268,8 @@
         "x-examples": {
           "example-1": {
             "tenant_code": "T657",
-            "tenant_age": 35,
-            "tenant_gender": "Female",
+            "person_1_age": 35,
+            "person_1_gender": "Female",
             "tenant_ethnic_group": "White: English/Scottish/Welsh/Northern Irish/British",
             "tenant_nationality": "UK national resident in UK",
             "previous_housing_situation": "Private sector tenancy",