Fix logging genesis time

[poszu]

Was:

INFO    version: v0.9.0-4-g77cf845, dir: .../.cache/poet, datadir: .../.cache/poet/data, genesis: {0 63824918400 <nil>}

[codecov]

Codecov Report

Merging #356 (3117a6b) into develop (6b87df5) will increase coverage by 0.1%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           develop    #356     +/-   ##
=========================================
+ Coverage     71.7%   71.9%   +0.1%     
=========================================
  Files           20      20             
  Lines         1749    1749             
=========================================
+ Hits          1255    1258      +3     
+ Misses         366     364      -2     
+ Partials       128     127      -1     

see 1 file with indirect coverage changes