Converting the arguments in camelcase format

Author: eduard13

dev/tests/api-functional/testsuite/Magento/GraphQl/Wishlist/AddBundleProductToWishlistTest.php

@@ -129,8 +129,8 @@ private function getQuery(
         return <<<MUTATION
 mutation {
   addProductsToWishlist(
-    wishlist_id: {$wishlistId},
-    wishlist_items: [
+    wishlistId: {$wishlistId},
+    wishlistItems: [
       {
         sku: "{$sku}"
         quantity: {$qty}

dev/tests/api-functional/testsuite/Magento/GraphQl/Wishlist/AddConfigurableProductToWishlistTest.php

@@ -116,8 +116,8 @@ private function getQuery(
         return <<<MUTATION
 mutation {
   addProductsToWishlist(
-    wishlist_id: {$wishlistId},
-    wishlist_items: [
+    wishlistId: {$wishlistId},
+    wishlistItems: [
       {
         sku: "{$childSku}"
         parent_sku: "{$parentSku}"

dev/tests/api-functional/testsuite/Magento/GraphQl/Wishlist/AddDownloadableProductToWishlistTest.php

@@ -172,8 +172,8 @@ private function getQuery(
         return <<<MUTATION
 mutation {
   addProductsToWishlist(
-    wishlist_id: 0,
-    wishlist_items: [
+    wishlistId: 0,
+    wishlistItems: [
       {
         sku: "{$sku}"
         quantity: {$qty}

dev/tests/api-functional/testsuite/Magento/GraphQl/Wishlist/DeleteProductsFromWishlistTest.php

@@ -87,8 +87,8 @@ private function getQuery(
         return <<<MUTATION
 mutation {
   removeProductsFromWishlist(
-    wishlist_id: {$wishlistId},
-    wishlist_items_ids: [{$wishlistItemId}]
+    wishlistId: {$wishlistId},
+    wishlistItemsIds: [{$wishlistItemId}]
 ) {
     userInputErrors {
       code

dev/tests/api-functional/testsuite/Magento/GraphQl/Wishlist/UpdateProductsFromWishlistTest.php

@@ -93,8 +93,8 @@ private function getQuery(
         return <<<MUTATION
 mutation {
   updateProductsInWishlist(
-    wishlist_id: {$wishlistId},
-    wishlist_items: [
+    wishlistId: {$wishlistId},
+    wishlistItems: [
       {
         wishlist_item_id: "{$wishlistItemId}"
         quantity: {$qty}