Run multiple threads for PBFT

[ashamis]

No description provided.

[codecov-io]

Codecov Report

Merging #838 into master will increase coverage by 2.39%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #838      +/-   ##
==========================================
+ Coverage   77.94%   80.33%   +2.39%     
==========================================
  Files         154      131      -23     
  Lines       11568    10360    -1208     
==========================================
- Hits         9016     8322     -694     
+ Misses       2552     2038     -514

Flag	Coverage Δ
#e2e_BFT	?
#e2e_CFT	70.04% <ø> (-2.22%)	⬇️
#unit_BFT	?
#unit_CFT	68.69% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
src/consensus/pbft/pbftrequests.h	0% <0%> (-94.44%)	⬇️
src/apps/luageneric/luageneric.cpp	86.87% <0%> (ø)	⬆️
src/node/rpc/frontend.h	67.32% <0%> (-9.34%)	⬇️
src/node/rpc/commonhandlerregistry.h	61.08% <0%> (-1.8%)	⬇️
src/enclave/rpcsessions.h	92.86% <0%> (-3.57%)	⬇️
src/kv/kvtypes.h	48.28% <0%> (-3.45%)	⬇️
src/node/rpc/memberfrontend.h	84.71% <0%> (ø)	⬆️
src/node/nodetonode.h	85.23% <0%> (-2.27%)	⬇️
src/luainterp/luajson.h	93.86% <0%> (ø)	⬆️
src/enclave/rpccontext.h	84.85% <0%> (-1.52%)	⬇️
... and 20 more

[ghost]

worker_threads@4922 aka 20200213.25 vs master ewma over 30 builds from 4542 to 4911