[R4R] libs/log: add year to log format

[yutianwu]

According to #2706, I encountered a problem about log format collecting logs to ELK stack for lacking year in timestamp.

Our log format before is:

NOTE[04-25|14:45:08] ABCI Replay Blocks                       module=consensus appHeight=0 storeHeight=0 stateHeight=0

I want to change it to

NOTE[2017-04-25|14:45:08] ABCI Replay Blocks                       module=consensus appHeight=0 storeHeight=0 stateHeight=0

It will help a lot to analyze logs for us.

[codecov-io]

Codecov Report

Merging #2707 into develop will decrease coverage by 0.2%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop    #2707      +/-   ##
===========================================
- Coverage    61.72%   61.52%   -0.21%     
===========================================
  Files          207      207              
  Lines        16942    16942              
===========================================
- Hits         10458    10424      -34     
- Misses        5622     5652      +30     
- Partials       862      866       +4

Impacted Files	Coverage Δ
libs/log/tmfmt_logger.go	88.67% <100%> (ø)	⬆️
consensus/state.go	76.17% <0%> (-2.82%)	⬇️
privval/ipc_server.go	67.92% <0%> (-1.89%)	⬇️
consensus/reactor.go	70.83% <0%> (-1.17%)	⬇️

[melekes]

Refs #1212

[yutianwu]

I see, but it seems there is no conclusion. When can we sit down to reach an agreement and set out to do that. I can help.