Fix units of BFREQ / BCURRENT
In the following tests it is unclear whether the units for BFREQ and BCURRENT are correct Degrader-1 Distribution-Binomial-1 Distribution-Gauss-1 Distribution-Gauss-2 EGunCTF3-1 EGunCTF3-2 ExternalFieldTest LaserEmission-1 OpalRingTest ParallelPlateFurman1 ParallelPlateVaughan1 PSIGUN-1 RestartTest-1 RestartTest-2 RestartTest-3 RestartTest-4 RestartTest-5 RestartTest-6 RestartTest-7 RestartTest-8 RingCyclotron RingCyclotronMatched RingCyclotronMTS RingCyclotronSingleParticle Scan-1