fixes: addresses a number of logic issues in CDR engine

- improved handling of filters/targets for inclusion/exclusion flags, and where multiple filters/targets exist across classes of patient data
- fixing right side of target interval used for target testing at value of $dateTarget passed to test_rules_clinic() instead of a value that floats with changes to left side of the interval
- fix to divide by zero error in evaluating percent of passing rules

more details at:
openemr#7153
openemr#7157
openemr#7161