IMPALA-7703: Update to Sentry 2.1.0
IMPALA-7703: Update to Sentry 2.1.0

This patch bumps the CDH_BUILD_NUMBER to 632827 in order to use Sentry
2.1.0.

Testing:
- Ran all core tests

Change-Id: I001d17313663171bc6ff23d62026c258486726a1
Reviewed-on: http://gerrit.cloudera.org:8080/11678
Reviewed-by: Impala Public Jenkins <039b6b20426ff68ebe492b3021890d8c8fd010c9@cloudera.com>
Tested-by: Impala Public Jenkins <039b6b20426ff68ebe492b3021890d8c8fd010c9@cloudera.com>

cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala