ntp-ntpd: Fixed unpacking of ntpq -p values

[leo-pempera]

When the chosen ntp Server (maked by *) has one or more whitespaces in its name, the original parsing fails with too many values to unpack.

Example:

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
 0.ubuntu.pool.n .POOL.          16 p    -   64    0    0.000    0.000   0.000
 1.ubuntu.pool.n .POOL.          16 p    -   64    0    0.000    0.000   0.000
 2.ubuntu.pool.n .POOL.          16 p    -   64    0    0.000    0.000   0.000
 3.ubuntu.pool.n .POOL.          16 p    -   64    0    0.000    0.000   0.000
 ntp.ubuntu.com  .POOL.          16 p    -   64    0    0.000    0.000   0.000
+mail.gunnarhofm 192.53.103.103   2 u  110  256  377    2.793   -0.228   0.157
-gps.s-buettgen. 131.188.3.222    2 u  164  256  377    3.311    0.129   0.534
+ntp1.kashra-ser 192.168.100.15   2 u  174  256  377   13.709   -0.834   0.278
-47.ip-51-75-67. 17.253.14.251    2 u  156  256  217    4.930   -0.049   0.111
*185.232.69.65 ( 79.133.44.146    2 u  232  256  377    0.398   -0.182   0.170

peer, refid, stratum, _type, when, poll, reach, delay, offset, jitter = line[1:].split()
ValueError: too many values to unpack (expected 10)

A fix is to directly access the variables after remote via a negative index, as every value after is properly sanitized.

I also removed all unused extracted variables.

[markuslf]

Thank you. I also enhanced the unit tests.