Update configuration of the script needed to run the EM test.
From branch 'LHCBGAUSS-1120.Update'
See merge request !222 (merged)
(cherry picked from commit b6f6f128)
e675c1e4 LHCBGAUSS-1120.Update 9ba1aaa1 add check for histograms + increase stats to pgun fb87b5f9 Minor changes to the stirring script