Add margin of error for TestBallastMemory (#3249)
Add margin of error for TestBallastMemory (#3249)

Fixes #3233

Signed-off-by: Juraci Paixão Kröhling <112c059aa3c53adcd644328dbabbdcbe0fa8f801@kroehling.de>
open-telemetry/opentelemetry-collector-contrib,open-telemetry/opentelemetry-collector-contrib,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector