Fix logger warning in P2P

[dvmazur]

This PR fixes a warning message in P2P's control.py.

Fixes verbose messages like that:

[codecov]

Codecov Report

Merging #361 (7e30d47) into master (697e1c3) will decrease coverage by 0.14%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master     #361      +/-   ##
==========================================
- Coverage   83.53%   83.38%   -0.15%     
==========================================
  Files          66       66              
  Lines        6139     6139              
==========================================
- Hits         5128     5119       -9     
- Misses       1011     1020       +9     

Impacted Files	Coverage Δ
hivemind/p2p/p2p_daemon_bindings/control.py	92.54% <50.00%> (ø)
hivemind/averaging/matchmaking.py	83.18% <0.00%> (-1.21%)	⬇️
hivemind/dht/node.py	91.40% <0.00%> (-1.20%)	⬇️