Add realistic ChipErase/PageErase/PageProgram durations (fixes flash_test), fix halt after HW Reset
Add realistic ChipErase/PageErase/PageProgram durations (fixes flash_test), fix halt after HW Reset

pyocd/pyOCD,mesheven/pyOCD,mbedmicro/pyOCD,mbedmicro/pyOCD,pyocd/pyOCD,flit/pyOCD,mesheven/pyOCD,mbedmicro/pyOCD,mesheven/pyOCD,flit/pyOCD