<v1.4> 优化 fish_system 中的方法 conf_as_dict：

[halfapple]

解析错误时，返回 reason

[coveralls]

Pull Request Test Coverage Report for Build 697

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.3%) to 94.635%

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Totals
Change from base Build 688:	0.3%
Covered Lines:	882
Relevant Lines:	932

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💛 - Coveralls