Flaky tests about magnolify

[nevillelyh]

Turns out this revealed a munit bug. Will have to wait for a new seed for repro.
scalameta/munit#195

[nevillelyh]

A different flaky test this time:

==> X magnolify.guava.test.FunnelDerivationSuite.Prop: Node.uniqueness  4.397s munit.FailException: /home/travis/build/spotify/magnolify/guava/src/test/scala/magnolify/guava/test/FunnelDerivationSuite.scala:43
42:    val g = arb.arbitrary
43:    property(s"$name.uniqueness") {
44:      Prop.forAll(Gen.listOfN(10, g)) { xs =>
Failing seed: yFlFMvPnhxlmzS1zG3NqNVtZP0B8PZf_fkzdFJPOhzF=
You can reproduce this failure by adding the following override to your suite:
  override val scalaCheckInitialSeed = "yFlFMvPnhxlmzS1zG3NqNVtZP0B8PZf_fkzdFJPOhzF="

[RustedBones]

Closing since no flaky test were observed in GHA recently