auth fix: creator is null in toString() called by consistent-hash LB when verifying permission

[xuliguov5]

…reator of auth element is null by tostring method.

[codecov]

Codecov Report

Merging #1385 (a36d75f) into master (8bda451) will increase coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##             master    #1385   +/-   ##
=========================================
  Coverage     62.36%   62.36%           
  Complexity     5827     5827           
=========================================
  Files           385      385           
  Lines         31955    31955           
  Branches       4460     4460           
=========================================
+ Hits          19929    19930    +1     
  Misses        10003    10003           
+ Partials       2023     2022    -1     

Impacted Files	Coverage Δ	Complexity Δ
...a/com/baidu/hugegraph/auth/HugeGraphAuthProxy.java	3.98% <0.00%> (ø)	0.00 <0.00> (ø)
...va/com/baidu/hugegraph/task/ServerInfoManager.java	70.78% <0.00%> (+0.56%)	51.00% <0.00%> (+1.00%)

---

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 8bda451...a36d75f. Read the comment docs.