fix add hosts

[HarrisChu]

No description provided.

[codecov-commenter]

Codecov Report

Merging #407 (c30ac10) into master (453064d) will increase coverage by 0.29%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #407      +/-   ##
============================================
+ Coverage     63.68%   63.98%   +0.29%     
- Complexity      705      709       +4     
============================================
  Files            65       65              
  Lines          3343     3343              
  Branches        477      477              
============================================
+ Hits           2129     2139      +10     
+ Misses          889      882       -7     
+ Partials        325      322       -3     

Impacted Files	Coverage Δ
...java/com/vesoft/nebula/client/meta/MetaClient.java	59.11% <0.00%> (+4.92%)	⬆️

---

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 453064d...c30ac10. Read the comment docs.

[Nicole00]

excellent job ！