AxisEPICS.py: do not assert in isBrakeReleased()
Part 1 of removing assert statements: Remove the assert in isBrakeReleased() in AxisEPICS.py and return True only if both "-R" and -RB" PVs are True
Part 1 of removing assert statements: Remove the assert in isBrakeReleased() in AxisEPICS.py and return True only if both "-R" and -RB" PVs are True