Replace array join by string literals on logging calls - Closes #2800

[2snEM6]

What was the problem?

Array.join() was being used to concatenate strings instead of using string literals when logging.

How did I fix it?

Replaced Array.join() by string literals on the following files:

logic/multisignature.js
logic/transaction.js
logic/vote.js
modules/blocks/process.js
modules/blocks/verify.js
modules/cache.js
modules/delegates.js
modules/loader.js
modules/peers.js
modules/transport.js

How to test it?

Run normal testing procedures.

Review checklist

• The PR resolves Replace array join for template literals when logging messages #2800
• All new code is covered with unit tests
• All new code was formatted with Prettier
• Linting passes
• Tests pass
• Commit messages follow the commit guidelines
• Documentation has been added/updated

[MaciejBaj]

@limiaspasdaniel please resolve the conflicts.

[2snEM6]

@MaciejBaj conflicts have been fixed :)