fix failover cluster invoke bug

[leizhiyuan]

Motivation:

Explain the context, and why you're making that change.
To make others understand what is the problem you're trying to solve.

Modification:

Describe the idea and modifications you've done.

Result:

Fixes #648

If there is no issue then describe the changes introduced by this PR.

[ujjboy]

LGTM

[codecov-io]

Codecov Report

Merging #650 into 5.5 will decrease coverage by 0.02%.
The diff coverage is 0%.

@@             Coverage Diff              @@
##                5.5     #650      +/-   ##
============================================
- Coverage     70.92%   70.89%   -0.03%     
  Complexity     1150     1150              
============================================
  Files           382      382              
  Lines         15887    15888       +1     
  Branches       2567     2567              
============================================
- Hits          11268    11264       -4     
- Misses         3275     3281       +6     
+ Partials       1344     1343       -1

Impacted Files	Coverage Δ	Complexity Δ
...va/com/alipay/sofa/rpc/client/FailoverCluster.java	72.22% <0%> (-2.07%)	0 <0> (ø)
...java/com/alipay/sofa/rpc/module/LookoutModule.java	52.63% <0%> (-31.58%)	3% <0%> (-1%)
...ipay/sofa/rpc/server/bolt/BoltServerProcessor.java	67.2% <0%> (-5.6%)	23% <0%> (-3%)
.../sofa/rpc/bootstrap/DefaultClientProxyInvoker.java	90.32% <0%> (-1.62%)	0% <0%> (ø)
...ipay/sofa/rpc/tracer/sofatracer/RpcSofaTracer.java	88.27% <0%> (-0.93%)	0% <0%> (ø)
...va/com/alipay/sofa/rpc/server/rest/RestServer.java	73.27% <0%> (-0.87%)	0% <0%> (ø)
...com/alipay/sofa/rpc/context/RpcRuntimeContext.java	90.24% <0%> (+1.21%)	0% <0%> (ø)	⬇️
...pay/sofa/rpc/transport/ClientTransportFactory.java	78.46% <0%> (+1.53%)	0% <0%> (ø)	⬇️
...pay/sofa/rpc/message/bolt/BoltInvokerCallback.java	81.03% <0%> (+1.72%)	8% <0%> (+1%)	⬆️
...n/java/com/alipay/sofa/rpc/common/SofaConfigs.java	82.14% <0%> (+1.78%)	0% <0%> (ø)	⬇️
... and 3 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update bc42b9e...0c2d52c. Read the comment docs.