server: Allow debug mode when there is no DAQ attached
server: Allow debug mode when there is no DAQ attached

With PyDAQmx version , if there isn't a DAQ server attached it raises
a NotImplementedError error:

Traceback (most recent call last):
  File "scripts/run-daq-server", line 2, in <module>
    from daqpower.server import run_server
  File "/work/workload_automation/daq-server/daqpower/server.py", line 40, in <module>
    from daqpower.daq import DaqRunner, list_available_devices, CAN_ENUMERATE_DEVICES
  File "/work/workload_automation/daq-server/daqpower/daq.py", line 58, in <module>
    from PyDAQmx.DAQmxFunctions import DAQmxGetSysDevNames
  File "/work/workload_automation/daq-server/.venv/lib/python3.6/site-packages/PyDAQmx/__init__.py", line 3, in <module>
    from . import DAQmxConfig
  File "/work/workload_automation/daq-server/.venv/lib/python3.6/site-packages/PyDAQmx/DAQmxConfig.py", line 94, in <module>
    raise NotImplementedError("Location of niDAQmx library and include file unknown on %s - if you find out, please let the PyDAQmx project know" % (sys.platform))
NotImplementedError: Location of niDAQmx library and include file unknown on linux - if you find out, please let the PyDAQmx project know

Catch the NotImplementedError and allow the script to run in debug
mode.

ARM-software/daq-server