fix: buffered body write and fixed SDK logging

[antusus]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build #1844

• 20 of 37 (54.05%) changed or added relevant lines in 3 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.1%) to 69.815%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/main/java/com/box/sdk/BoxAPIRequest.java	17	19	89.47%
src/main/java/com/box/sdk/BoxLogger.java	2	17	11.76%

Files with Coverage Reduction	New Missed Lines	%
src/main/java/com/box/sdk/MetadataQuery.java	1	92.59%

Totals
Change from base Build #1807:	0.1%
Covered Lines:	7237
Relevant Lines:	10366

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💛 - Coveralls

[lukaszsocha2]

Looks ok. Please remember that removing public method enableLogger() is small breaking change and we need to communicate it proper way