Updated field initialization in test (#1463)

* Updated field initialization in test

- Changed the initialization of a field in a test from null to default

* Updated blueprint version in generator spec

- The blueprint version for 'generator-jhipster-dotnetcore' has been updated
- Previous version was 4.0.0
- New version is 4.1.0

generators/bootstrap-application/__snapshots__/generator.spec.js.snap

@@ -22,7 +22,7 @@ exports[`SubGenerator bootstrap-application of dotnetcore JHipster blueprint > r
   "blueprints": [
     {
       "name": "generator-jhipster-dotnetcore",
-      "version": "4.0.0",
+      "version": "4.1.0",
     },
   ],
   "buildTool": "maven",

generators/dotnetcore/templates/dotnetcore/test/Project.Test/Controllers/_persistClass_ControllerIntTest.cs.ejs

@@ -330,8 +330,8 @@ namespace <%= namespace %>.Test.Controllers
         {
             var databaseSizeBeforeTest = await _<%= camelCasedEntityClass %>Repository.CountAsync();
 
-            // Set the field to null
-            _<%= camelCasedEntityClass %>.<%= field.fieldNamePascalized %> = null;
+            // Set the field to default
+            _<%= camelCasedEntityClass %>.<%= field.fieldNamePascalized %> = default;
 
             // Create the <%= pascalizedEntityClass %>, which fails.
             <%_ if (hasDto) { _%>