feat(server): check that serverMode implementation is correct#2051

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knagaitsev wants to merge 4 commits intowebpack:masterfrom

knagaitsev:serverMode-implementation-check

Commits on Jun 20, 2019

feat(server): check for serverMode implementation problems
knagaitsev
committed

Commits on Jun 23, 2019

test(server): remove extends BaseServer requirement
knagaitsev
committed

Commits on Jun 25, 2019

feat(server): test socket server implementation with schema utils
knagaitsev
committed
fix(server): allow any properties for server impl schema
knagaitsev
committed