Issue mfxc00318 runs 10 and 13

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Fixed pedestals for epix10ka_pedestals_calibration for run 86

Comments on issue

New Gabriel's formulae was implemented in epix10ka_offset_calibration and not implemented in epix10ka_pedestals_calibration. Low pedestal PL was not evaluated consistently for two switching gain modes AHL and AML in the pedestal calibration script.