IBST Stiffness Test - Individual Wheel Pressures
Runs brake stiffness individually for all wheels, and pass/fails on a threshold of pressure discrepancy, pressure value, or dead travel stroke. If executing with DIAG_LINK_ACTIVE then EPBs will release one at a time, which is required if check_swapped_rear_lines is true.
TEST-BRAKE_ALL_STIFFNESS-PRESSURE-DELTA