adds/updates unit tests for member and member type repository
Merge remote-tracking branch 'origin/6.2.0' into 7.0.2

Conflicts:
	src/Umbraco.Core/Models/Member.cs
	src/Umbraco.Tests/Persistence/Repositories/MemberRepositoryTest.cs
	src/Umbraco.Tests/Persistence/Repositories/MemberTypeRepositoryTest.cs
	src/Umbraco.Tests/TestHelpers/Entities/MockedMember.cs