fix: Fix oss command

[arjankowski]

There was a bug in box oss:
ENOENT: no such file or directory, open '/usr/local/lib/@box/cli/LICENSE-THIRD-PARTY.txt'
This happened with both npm and binary installations.

Also, this command previously required a client, which does not make sense here — box oss should only print the local OSS licenses file and should not depend on API client initialization.

[coveralls]

Pull Request Test Coverage Report for Build 23438826464

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.002%) to 84.003%

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Totals
Change from base Build 23194454820:	0.002%
Covered Lines:	4979
Relevant Lines:	5667

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💛 - Coveralls

[Hawra2020]

LGTM