[AC-192] When an instance is completed, the database created does not match with the Initial Catalog in the database (#36)

Author: ricardogamboagap

src/EdFi.AdminConsole.InstanceMgrWorker.Provisioner/Provisioners/InstanceDatabaseNameBuilder.cs

@@ -60,7 +60,7 @@ public string SampleDatabase
             get => DatabaseName(TemplateSampleDatabase);
         }
 
-        public string SandboxNameForKey(string key) => DatabaseName(SandboxPrefix + key);
+        public string SandboxNameForKey(string key) => DatabaseName(TemplatePrefix + key);
 
         public string KeyFromSandboxName(string sandboxName) => sandboxName.Replace(DatabaseName(SandboxPrefix), string.Empty);