def count_remaining
      count = @executables_inputs.values.map { |a| a.values.count { |p| not p.is_a?(RightScale::SecureDocument) } }
      return count.inject { |sum,x| sum + x } || 0
    end
def count_remaining
      count = @executables_inputs.values.map { |a| a.values.count { |p| not p.is_a?(RightScale::SecureDocument) } }
      return count.inject { |sum,x| sum + x } || 0
    end
Return the number of credentials remaining to be gathered