Added option --match to testHarness.sh

### Description
New option for functional test harness script:  --match <string to match>.
This 'match' is done not only on the filename (like --filter), but it also includes the directory.
It can be used together with '--filter'.

*Edit Fermín*: this PR fixes #586 (this time, we don't marked the branch with the issue name, as an expection).