Move YARN-3580 in CHANGES.txt from 2.8 to 2.7.2.
Move YARN-3580 in CHANGES.txt from 2.8 to 2.7.2.

(cherry picked from commit d2e01f4ed87c3c41156ec9a68855f923f8c0adf9)

zrccxyb62/hadoop,zrccxyb62/hadoop,zrccxyb62/hadoop,Microsoft-CISL/hadoop-prototype,Microsoft-CISL/hadoop-prototype,zrccxyb62/hadoop,Microsoft-CISL/hadoop-prototype,zrccxyb62/hadoop,zrccxyb62/hadoop,Microsoft-CISL/hadoop-prototype,Microsoft-CISL/hadoop-prototype,Microsoft-CISL/hadoop-prototype,Microsoft-CISL/hadoop-prototype,Microsoft-CISL/hadoop-prototype,zrccxyb62/hadoop