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ARROW-603: [C++] Add RecordBatch::Validate method, call in RecordBatch ctor in debug builds

This function will help catch malformed RecordBatch objects during development

Author: Wes McKinney <wes.mckinney@twosigma.com>

Closes #466 from wesm/ARROW-603 and squashes the following commits:

dfdb048 [Wes McKinney] Fix incorrect clang-tidy name
5a51f69 [Wes McKinney] Add RecordBatch::Validate method, call in RecordBatch ctor in debug builds