test/lsm_test.sh encountering error: exportfs: can't open /var/lib/nfs/etab for reading

[tasleson]

When running the test/lsm_test.sh we encounter:

export_fs:
  - msg: "PLUGIN_BUG(2): Got error 1 from targetd: RuntimeError: Unexpected exit code\
      \ \"['exportfs', '-o', 'ro,anonuid=-1,anongid=-1', '192.168.2.1:/mnt/btrfs/targetd_fs/RADK_fs_CXMQ']\"\
      \ 1, out= :exportfs: can't open /var/lib/nfs/etab for reading\n "
    rc: false
    stack_trace: "Traceback (most recent call last):\n  File \"/tmp/libstoragemgmt/test/plugin_test.py.in\"\
      , line 216, in present\n    rc = getattr(self.o, _proxy_method_name)(*args,\
      \ **kwargs)\n  File \"/usr/lib64/python3.13/site-packages/lsm/_common.py\",\
      \ line 591, in inner\n    r = func(*args, **kwargs)\n  File \"/usr/lib64/python3.13/site-packages/lsm/_client.py\"\
      , line 1061, in export_fs\n    return self._tp.rpc('export_fs', _del_self(locals()))\n\
      \           ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/usr/lib64/python3.13/site-packages/lsm/_transport.py\"\
      , line 149, in rpc\n    (reply, msg_id) = self.read_resp()\n               \
      \       ~~~~~~~~~~~~~~^^\n  File \"/usr/lib64/python3.13/site-packages/lsm/_transport.py\"\
      , line 182, in read_resp\n    raise LsmError(**e)\nlsm._common.LsmError: PLUGIN_BUG(2):\
      \ Got error 1 from targetd: RuntimeError: Unexpected exit code \"['exportfs',\
      \ '-o', 'ro,anonuid=-1,anongid=-1', '192.168.2.1:/mnt/btrfs/targetd_fs/RADK_fs_CXMQ']\"\
      \ 1, out= :exportfs: can't open /var/lib/nfs/etab for reading\n \n"

according to this the problem stems from not starting the nfs-server at least once, which creates /var/lib/nfs/etab

Manually starting & stoping nfs-server did indeed allow us to run the test/lsm_test.sh without errors.

We need to update the test scripts to do this.