get rid of guava dependency

[Nicole00]

get rid of guava to avoid jar conflict.

[codecov-commenter]

Codecov Report

Patch coverage: 63.63% and project coverage change: +0.11 🎉

Comparison is base (f628fb9) 56.13% compared to head (a346737) 56.24%.

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Additional details and impacted files

@@             Coverage Diff              @@
##             master     #148      +/-   ##
============================================
+ Coverage     56.13%   56.24%   +0.11%     
+ Complexity       85       79       -6     
============================================
  Files            18       18              
  Lines          1525     1554      +29     
  Branches        287      297      +10     
============================================
+ Hits            856      874      +18     
- Misses          515      519       +4     
- Partials        154      161       +7     

Impacted Files	Coverage Δ
...la/com/vesoft/exchange/common/config/Configs.scala	62.03% <0.00%> (ø)
...cala/com/vesoft/exchange/common/MetaProvider.scala	70.49% <66.66%> (-1.39%)	⬇️
...com/vesoft/exchange/common/utils/NebulaUtils.scala	68.04% <68.57%> (+0.29%)	⬆️
...ala/com/vesoft/exchange/common/GraphProvider.scala	64.00% <100.00%> (-3.86%)	⬇️

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[Nicole00]

@wey-gu please help to review again, thanks~~