Update integratedTests tag for multiple tolerances ats scripts.

[CusiniM]

resolves https://github.com/GEOSX/GEOSX/issues/1768

[TotoGaz]

We could change

( "Sneddon_smoke",
  "Sneddon with horizontal fracture",
  ((1, 1, 1), (2,2,1)),
  0, 1,
  {"atol": 1.0E-8, "rtol": 4.0E-7 }
),

into a dataclass someday.

[CusiniM]

We could change

( "Sneddon_smoke",
  "Sneddon with horizontal fracture",
  ((1, 1, 1), (2,2,1)),
  0, 1,
  {"atol": 1.0E-8, "rtol": 4.0E-7 }
),

into a dataclass someday.

yeah, we could make this a bit more elegant indeed. This should gives us what we need for now though ( I hope coz I have not tested it yet).