Fixed some warning / issues mentioned by SonarLint.

[KingAlex1985]

Description of change

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Type of change

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• Enhancement (a non-breaking change which adds functionality)

How the change has been tested

Only by Unit tests, if any existed.

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Change checklist

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• My code follows the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• New and existing unit tests pass locally with my changes

[kwek20]

@KingAlex1985 What made you change address.getAddress().getHash() to address.getAddressHash().getHashString()?
I find it personally not needed to call it getAddressHash, as you just need to know its an address, not a hash.
Id rather disable the lint warning if that was the reason :)

[KingAlex1985]

Hello @kwek20,
yes I did the change because of the SonarLint mentioned issue, which is saying this:

==========================================

Rename field "address" (Address.java Line 5)

A field should not duplicate the name of its containing class
Code smell - Major - java:S1700

It's confusing to have a class member with the same name (case differences aside) as its enclosing class.
This is particularly so when you consider the common practice of naming a class instance for the class itself.

Best practice dictates that any field or member with the same name as the enclosing class be renamed
to be more descriptive of the particular aspect of the class it represents or holds.

==========================================

So that I have decided to name it "AddressHash".
But if this is not a good idea I can change it back, if you like?

Greetings
Alex