Fixed Issues in Impala

There are no fixed issues in this release of Cloudera Runtime.

CDPD-8014: Upgrade to Guava 28.1 to avoid CVE-2018-10237

Impala has been upgraded to use Guava version 28.1 to avoid CVE-2018-10237.

CDPD-7369: Impala - Upgrade to Jetty 9.4.26 to avoid CVEs

Impala now uses Jetty 9.4.26, which addresses the following CVEs: CVE‑2017‑7656, CVE‑2017‑7657,CVE‑2017‑7658, CVE‑2018‑12536, CVE‑2017‑9735, CVE‑2019‑10247.