Fix randomly failing tests

[2snEM6]

Expected behavior

No tests should fail

Actual behavior

Currently, a series of failures when running tests appear inconsistently and as a consequence they slow down PR review and development.
Those failures are mostly related to the environment where they are being executed (Jenkins), as most of them present no failures in local environment.

Functional WS tests:

• Exceeded time limit to wait for confirmations: it happens randomly. See here

Unit tests

• Fix brittle cache tests #3131 Cache Disabled: it happens randomly too and it´s probably due to Cache tests not being atomic and disabling or enabling cache get overlapped. See here
• Uncaught TypeError: Cannot read property 'height' of undefined https://github.com/LiskHQ/lisk/blob/949b41e80eb30992385f90b5b59bf7006b388a73/framework/test/mocha/unit/modules/chain/submodules/loader.js#L488
• BatchError: deadlock detected in Transaction entity tests #4903 BatchError: deadlock detected https://github.com/LiskHQ/lisk/blob/f0d132869df23642e0300a2c30bb2817ad07db12/framework/test/mocha/unit/modules/chain/components/storage/entitites/transaction.js#L75
• #XXXX Remove usage of test/mocha/common/application.js across unit tests
• #XXXX Remove usage of test/mocha/common/modules_loader.js across unit tests

Integration tests

• Mocha integration test suite execution does not finish properly #3240 Mocha integration test suite execution does not finish properly
• #XXXX Replace usage of test/mocha/common/application.js across integration tests

Note: I will be adding more as soon as I collect them.

Steps to reproduce

Run all tests

Which version(s) does this affect? (Environment, OS, etc...)

*

[shuse2]

Closing this issue because unit, integration and functional tests are stable now