class Isolator::Configuration

defauls to false
- ‘send_notifications` - whether to send notifications (through uniform_notifier);
- `logger` - logger instance (nil by default)
NOTE: env is infered from RACK_ENV and RAILS_ENV.
defaults to true in test env and false otherwise.
- `raise_exceptions` - whether to raise an exception in case of offense;
Isolator configuration:

def initialize 

def initialize
  @logger = nil
  @raise_exceptions = test_env?
  @send_notifications = false
end

def test_env? 

def test_env?
  ENV["RACK_ENV"] == "test" || ENV["RAILS_ENV"] == "test"
end