Revert "Bump OpenJDK version to 19 on devserver"

Summary:
On FreeBSD, there is no openjdk19-jre port, so we can compile with 1.9,
but we need to run with 1.7. It seems preferable to maintain JRE/JDK
equivalent versions for now, until a corner case occurs.

This reverts commit 451ece6b1803380254eba5e9f4a506a4866bc8d8.

Test Plan: Build apache-ant port against openjdk17-jre

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D2911