Add option to silence deprecation warnings when running the tests about faker

[keshavbiswa]

Let me try it.

[stefannibrasil]

awesome, thank you!

[keshavbiswa]

So there are two approaches I see here,

1. To use class accessors to capture stdouts only when the variable is true, (skip_during will yield and ensure it's set to false after)? This makes it easy to turn it on/off for individual tests, depending on what we want to assert?
2. The other is to globally disable in in test_helper.rb, this is an easier approach, but makes it difficult to enable/disable individual tests.

@stefannibrasil Lmk what you think.

[stefannibrasil]

hi @keshavbiswa thanks for working on this. Yeah, number 1 seems to be what we need. We want to be able to skip the output when explicitly adding a skip block. If we add the block is because we know the test will generate the warning but there's nothing we can do until the generator is removed/updated, if that makes sense.