Process script errors should not be ignored

[pditommaso]

When a process script contains a syntax error or a missing variable, the process execution must stop even when errorStrategy is set to ignore.

For example, given:

process foo {
  errorStrategy 'ignore'
  """
  echo ${$ciao}
  """
}

It will print the following message, instead of stopping the execution

WARN: Error running process > Process `null` script contains error(s) -- error is ignored