Update: hessian2 & getty version

[AlexStocks]

What this PR does:

update hessian2 & getty version.

[zouyx]

Travis is failing

[codecov-io]

Codecov Report

Merging #473 into develop will decrease coverage by 0.55%.
The diff coverage is 59.42%.

@@             Coverage Diff             @@
##           develop     #473      +/-   ##
===========================================
- Coverage    67.05%   66.49%   -0.56%     
===========================================
  Files          178      184       +6     
  Lines         9369     9683     +314     
===========================================
+ Hits          6282     6439     +157     
- Misses        2471     2606     +135     
- Partials       616      638      +22     

Impacted Files	Coverage Δ
common/extension/metadata_report_factory.go	0.00% <0.00%> (ø)
common/extension/service_discovery.go	0.00% <0.00%> (ø)
common/rpc_service.go	86.25% <0.00%> (-1.18%)	⬇️
config/application_config.go	41.66% <ø> (ø)
config/consumer_config.go	56.25% <ø> (ø)
config/provider_config.go	55.88% <0.00%> (-3.50%)	⬇️
config/reference_config.go	78.70% <ø> (ø)
config_center/apollo/impl.go	82.71% <0.00%> (-4.30%)	⬇️
registry/protocol/protocol.go	81.27% <0.00%> (-0.38%)	⬇️
registry/zookeeper/registry.go	46.15% <30.00%> (-8.85%)	⬇️
... and 28 more

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[fangyincheng]

LGTM

[hxmhlt]

LGTM