This solves some minor annoyances in the run.php script:
A) profile is checked properly, independently of everything else.
B) cli tags get precedence over profile tags.
Indicentally, this also causes run.php to support both profile and
tag in command line together. Previously the use of profile did
invalidate the use of tags.
1. Create behat datadir within behat_dataroot not at same level
2. Define suffix for link and not use hard-coded values
3. Renamed ns_parallel to run.php
4. Rename variables to best understand them
5. Added support for each run to specify db, prefix, rerun and profile.
6. Showing number of steps in each line of parallel run.
Eloy Lafuente (stronk7)