[tacacs+ test]: Add TACACS+ test#372

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liuqu wants to merge 2 commits intosonic-net:masterfrom

Commits on Nov 30, 2017

[tacacs+ test]: Add TACACS+ test
Liuqu
committed

Commits on Dec 12, 2017

[tacacs+ test]: Remove src_ip test and unnecessary setup
Liuqu
committed