fix fraud posibility the client sent the unit price (#702)

* fix fraud posibility the client sent the unit price, fix unit test to use the fomat as server base

* fix bad coding convention

* update dotnet tool ef and nuget package

* Align MD with real database by default

tests/IntegrationTests/IntegrationTests.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="6.0.3" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="6.0.4" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
     <PackageReference Include="Moq" Version="4.17.2" />
     <PackageReference Include="xunit" Version="2.4.1" />