Check for selective primary transport also in case of parallel sim

[preghenella]

This PR fixes the selective transport feature which was not operative in the parallel simulation

[preghenella]

@sawenzel
common function is added

[preghenella]

@sawenzel
the second commit of this PR introduces a new bit in the PropEncoding to store the inhibit flag.
The location of the tobedone bit is unchanged.
Notice that I have reduced the hitMask field to 18 bits, given that there are 18 detectors (I might be wrong in case this is not the logic). This frees some room and we have 5 more bits that are currently unused.

This commit is not mandatory for this PR.
But it might come at handy to track what happens in the selective transport functionality.
It will be eventually needed for the "pause-and-continue" developments.

[sawenzel]

Needed urgently for next nightly test. Compilation checked locally.