[VOTE] Release Lucene/Solr 6.4.2 RC1

[Ishan Chattopadhyaya]

Please vote for release candidate 1 for Lucene/Solr 6.4.2The artifacts
can be downloaded
from:https://dist.apache.org/repos/dist/dev/lucene/lucene-solr-6.4.2-RC1-rev34a975ca3d4bd7fa121340e5bcbf165929e0542fYou
can run the smoke tester directly with this command:python3 -u
dev-tools/scripts/smokeTestRelease.py
\https://dist.apache.org/repos/dist/dev/lucene/lucene-solr-6.4.2-RC1-rev34a975ca3d4bd7fa121340e5bcbf165929e0542fHere's
my +1
SUCCESS! [0:52:41.429385]