CFE-4598: Added evaluation order in body file control

[victormlg]

Example:

body common control
{
  evaluation_order => "classic";
}

bundle agent __main__
{
# here the evaluation is "classic"
  methods:
    usebundle => A;
    usebundle => B;
}

bundle agent A
{
# here the evaluation is "classic"
}

body file control
{
  evaluation_order => "top_down";
}

bundle agent B
{
# here the evaluation is "top_down"
}

[larsewi]

Maybe you can link this to a ticket?

[larsewi]

Looks like you're adding it in the next commit. Then you should probably remove the comment?