Refactor3: fix more than one models have the same name the from different packages

[sdghchj]

1. fix: more than one models have the same the from different packages
2. fix: parse alias of alias of ……

I have to say, I try to changes the least code, but still a lot of work, and especially repair those tests.

[codecov-commenter]

Codecov Report

Merging #736 into master will decrease coverage by 2.98%.
The diff coverage is 72.86%.

@@            Coverage Diff             @@
##           master     #736      +/-   ##
==========================================
- Coverage   84.48%   81.50%   -2.99%     
==========================================
  Files           7        8       +1     
  Lines        1792     1665     -127     
==========================================
- Hits         1514     1357     -157     
- Misses        173      195      +22     
- Partials      105      113       +8     

Impacted Files	Coverage Δ
schema.go	86.74% <50.00%> (-10.08%)	⬇️
packages.go	60.83% <60.83%> (ø)
parser.go	77.12% <79.66%> (-2.64%)	⬇️
operation.go	88.46% <100.00%> (+0.89%)	⬆️
types.go	100.00% <100.00%> (ø)

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[easonlin404]

LGTM

[easonlin404]

@sdghchj Although this change is very a lot, I can understand the purpose you want to fix though the testing case. Thanks for the effort you're trying to keep changes the least. Awesome man. 💯