Coverage improvement.

[nursultanturdaliev]

Code coverage has been improved by 4% overall.

[mention-bot]

By analyzing the blame information on this pull request, we identified @RoyMontoya, @whoshuu and @jivimberg to be potential reviewers

[sibelius]

One thing that should be really tested is the creation and migration of the database

[nursultanturdaliev]

Ok I will test them too then :)

[nursultanturdaliev]

@sibeliusseraphini On last commit I renamed SugarContext.getSugarContext() to SugarContext.getInstance() because it returns private instance property if not null.
If the private property is instance then calling it's getter method getInstance if more convenient, in my opinion. How do you think?

[sibelius]

@nurolopher the only problem of changing a public API name is that you could introduce a breaking change to another person codes.

However, in this case, I think this method is used almost exclusively by Sugar implementation, so no problem.

Thanks, I will merge it this week

[nursultanturdaliev]

👍

[JonatanSalas]

@nurolopher could you check the conflicts?