Add Content-type header to Wiremock scenarios

Author: sfc-gh-pczajka

test/data/wiremock/mappings/auth/oauth/authorization_code/external_idp_custom_urls.json

@@ -61,6 +61,9 @@
       },
       "response": {
         "status": 200,
+        "headers": {
+          "Content-Type": "application/json"
+        },
         "jsonBody": {
           "access_token": "access-token-123",
           "refresh_token": "123",

test/data/wiremock/mappings/auth/oauth/authorization_code/new_tokens_after_failed_refresh.json

@@ -20,6 +20,9 @@
   },
   "response": {
     "status": 200,
+    "headers": {
+      "Content-Type": "application/json"
+    },
     "jsonBody": {
       "access_token": "access-token-123",
       "refresh_token": "refresh-token-123",

test/data/wiremock/mappings/auth/oauth/authorization_code/successful_flow.json

@@ -61,6 +61,9 @@
       },
       "response": {
         "status": 200,
+        "headers": {
+          "Content-Type": "application/json"
+        },
         "jsonBody": {
           "access_token": "access-token-123",
           "refresh_token": "123",

test/data/wiremock/mappings/auth/oauth/client_credentials/successful_auth_after_failed_refresh.json

@@ -21,6 +21,9 @@
   },
   "response": {
     "status": 200,
+    "headers": {
+      "Content-Type": "application/json"
+    },
     "jsonBody": {
       "access_token": "access-token-123",
       "refresh_token": "refresh-token-123",

test/data/wiremock/mappings/auth/oauth/client_credentials/successful_flow.json

@@ -23,6 +23,9 @@
       },
       "response": {
         "status": 200,
+        "headers": {
+          "Content-Type": "application/json"
+        },
         "jsonBody": {
           "access_token": "access-token-123",
           "refresh_token": "123",

test/data/wiremock/mappings/auth/oauth/refresh_token/refresh_successful.json

@@ -20,6 +20,9 @@
   },
   "response": {
     "status": 200,
+    "headers": {
+      "Content-Type": "application/json"
+    },
     "jsonBody": {
       "access_token": "access-token-123",
       "token_type": "Bearer",

test/data/wiremock/mappings/generic/snowflake_login_failed.json

@@ -7,10 +7,10 @@
       "request": {
         "urlPathPattern": "/session/v1/login-request",
         "method": "POST",
-	"queryParameters": {
-	  "request_id": {
+        "queryParameters": {
+          "request_id": {
             "matches": ".*"
-	  },
+          },
           "roleName": {
             "equalTo": "ANALYST"
           }
@@ -31,6 +31,9 @@
       },
       "response": {
         "status": 200,
+        "headers": {
+          "Content-Type": "application/json"
+        },
         "jsonBody": {
           "data": {
             "nextAction": "RETRY_LOGIN",

test/data/wiremock/mappings/generic/snowflake_login_successful.json

@@ -29,6 +29,9 @@
   "response": {
     "status": 200,
     "fixedDelayMilliseconds": "1000",
+    "headers": {
+      "Content-Type": "application/json"
+    },
     "jsonBody": {
       "data": {
         "masterToken": "token-m1",