Use JUnit5 in failsafe ITs

[slawekjaranowski]

also improvements to use artifacts from current build reactor

now ITs download artifacts from snapshot repository, which is available by parent pom

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[slawekjaranowski]

@olamy we should update parent pom ... but in newer parent we removed snapshot repositories which is used by ITs ...

After merge I will rebase it with your PR:

• Use junit platform runner to run junit 3, junit 4 and TestNG tests via vintage engine and testng engine #3179

[olamy]

LGTM. don't worry I can rebase in the branch.

[slawekjaranowski]

LGTM. don't worry I can rebase in the branch.

it can be some conflicts, so as you wish, I can try at evening

[olamy]

LGTM. don't worry I can rebase in the branch.

it can be some conflicts, so as you wish, I can try at evening

All good I just did it.
thanks!