fix import inner package in the format of third party package path and split test cases

[leejanee]

split test cases for third party package
and,Fix the bug that will cause the wrong package check result

[codecov]

Codecov Report

Merging #1412 (88cc9fb) into master (f47ca0f) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1412      +/-   ##
==========================================
- Coverage   54.79%   54.77%   -0.02%     
==========================================
  Files          76       76              
  Lines        7304     7306       +2     
==========================================
  Hits         4002     4002              
- Misses       2818     2819       +1     
- Partials      484      485       +1     

Flag	Coverage Δ
unittests	54.77% <100.00%> (-0.02%)	⬇️

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Impacted Files	Coverage Δ
pkg/dsl/definition/package.go	85.55% <100.00%> (+0.16%)	⬆️
...plicationconfiguration/applicationconfiguration.go	83.69% <0.00%> (-0.63%)	⬇️

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