Testing - ensure rules, flags, metrics all mesh

**Is your feature request related to a problem? Please describe.**
Ensure metric names between rules, flags, and BioMonTools metric names files all mesh together.

**Describe the solution you'd like**
Ensure no names left out between the files.

**Describe alternatives you've considered**
Use testthat tests similar to those included in BioMonTools.

**Additional context**
NA
