sts hitfinder: fix rotation of the hit covariance matrix
sts hitfinder: fix rotation of the hit covariance matrix.
It solves a problem described here: https://redmine.cbm.gsi.de/issues/2956
@f.uhlig, I have put the cov. matrix rotation to core/base/utils/CbmGeometryUtils.h. I don't know if it is the right place.
Edited by Sergey Gorbunov