fix(loader): support file name with prefix for hdfs source

[JackyYangPassion]

Purpose of the PR

• close [Improve] Loader support file name with prefix for hdfs source #570

Main Changes

support file name with prefix for hdfs source

Verifying these changes

• Trivial rework / code cleanup without any test coverage. (No Need)
• Already covered by existing tests, such as (please modify tests here).
• Need tests and can be verified as follows:
  • xxx

Does this PR potentially affect the following parts?

• Nope
• Dependencies (add/update license info)
• Modify configurations
• The public API
• Other affects (typed here)

Documentation Status

• Doc - TODO
• Doc - Done
• Doc - No Need

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 62.10%. Comparing base (b066b80) to head (98f2602).
Report is 26 commits behind head on master.

Files	Patch %	Lines
...e/hugegraph/loader/reader/hdfs/HDFSFileReader.java	80.00%	1 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #571      +/-   ##
============================================
- Coverage     62.49%   62.10%   -0.39%     
+ Complexity     1903      932     -971     
============================================
  Files           262       93     -169     
  Lines          9541     4550    -4991     
  Branches        886      532     -354     
============================================
- Hits           5963     2826    -3137     
+ Misses         3190     1513    -1677     
+ Partials        388      211     -177     

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[simon824]

LGTM

[imbajin]

Get it, keep the logic simple now