Refactoring task#6

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kzlomek wants to merge 8 commits intoadblockplus:masterfrom

kzlomek:refactoring_task

Commits on Jul 19, 2018

Commits on Jul 20, 2018

Updates in Updater class
kzlomek
committed

Commits on Jul 22, 2018

Code cleanup
kzlomek
committed

Commits on Aug 4, 2018

Addressed review comments
kzlomek
committed

Commits on Aug 8, 2018

Fixed thread safety and added more tests
kzlomek
committed

Commits on Aug 9, 2018

Reworked last commit applying review comments
kzlomek
committed

Commits on Aug 10, 2018

Updated UpdaterAndFilterEngineCreationTest to match coding convention
kzlomek
committed