monitor: Change factor from size_t to double

To support a broader range of possible factors users could apply, change
the optional factor from a size_t to double type. This allows a
configuration to use a decimal factor value.

Tested: N/A

Change-Id: Id0540872df41946b8b75b1b75a4ee130a9ed0876
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
3 files changed