Revert "Revert "Revert "Make OpenJDK 8 the default"""

This reverts commit c288d657623ed646343d867a413a26b0592c1853.

The launch control change that switched various builds
to JDK 8 was reverted so JDK 8 can't be mandatory without
breaking builds.

Change-Id: I5e3feb21488d3bb57c5718cfe105a931eeaa9587
3 files changed