Keep the Beam delay fixed as 0.5, and beam width will always
be 90% of RF pulse - Beam Delay.
This way we always have valid beam pulses and the beam end
never falls out at the same moment than RF end

It looks the trigger is got on the rising edge, so considering
the width of the pulser to determine the RF Pulse size.

Remove unecessary sets and include labels

E3-368

See merge request e3/wrappers/rf/e3-evr-island!2

First version for RFQ

See merge request gabrielfedel/e3-evr-island!1