Memory leakage + upgrade packages with vulnerabilities + support for running requests one time before start of test

[DinaYakovlev]

We had a memory leakage because of data that is being saved that seemed to be unnecessary.
(The _entries that is being saved in the aggregate object)
We deleted the data and also upgraded the 'lodash' and 'debug' packages because of known vulnerabilities issues:
https://nodesecurity.io/advisories/534
https://nodesecurity.io/advisories/577

[hassy]

Thanks for the PR @DY6229! I'll try to review & respond asap.

[enudler]

Very useful fix

[DinaYakovlev]

Added another commit.
This commit has the option to make requests before test start to run. the artillery json now can have another section called ‘before’, which has a single flow (like in a scenario) that will run once before the test.
also now this fork is rebased to this project with the last few merges.

[Kosta-Github]

@DY6229 is the before section only run once globally or run once for each individual virtual user? I would be in need for the latter, e.g., for a user login flow to generate an auth token used for that user for all subsequent requests...

@hassy any chance to get that in?

[hassy]

@Kosta-Github you can use a function step in your scenario definition to set up some state for each new virtual user: https://artillery.io/docs/http-reference/#function-steps-in-a-flow

@DY6229 There are 3 separate changes in this PR - is there any chance you could split those out (+ investigate why tests are failing)? The new before hook especially would be extremely useful. :)

[NivLipetz]

@hassy, @Kosta-Github the before section is in PR here: #612

[CLAassistant]

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