ARROW-6509: [C++][Gandiva] Re-enable Gandiva JNI tests and fix Travis CI failure#5417

Closed

pprudhvi wants to merge 2 commits intoapache:masterfrom pprudhvi:mimi

+11-2

Commits on Sep 18, 2019

disable mimalloc for xenial. enable gandiva jni tests
pprudhvi
committed

Commits on Sep 19, 2019

new travis flag to disable MIMALLOC
pprudhvi
committed