Jason Tedor faf5f55f41 Enforce Java 8 in Gradle builds
This commit forces builds with Gradle to require at least Java 8.

Closes #14499
2015-11-06 11:39:14 -05:00
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2015-11-06 11:39:14 -05:00
2015-11-05 14:28:30 -05:00