Add 0.12.0 release notes pt 2

[cwsteinbach]

No description provided.

[jackye1995]

Thanks for the additional patch! I read through a few Hive related classes and those are all I could find. @marton-bod @lcspinter @pvary anything else on your side that should be noted? I also saw a few bug fixes done by Marton for Tez issues.

[marton-bod]

Thanks @jackye1995! I think we might not want to list the Tez fixes, because those were write-related fixes and we don't yet support Tez writes - so don't want to confuse users :)

However, it might be worth including these:
Hive: enable dropping HMS tables despite metadata problems (#2583)
Hive: Add table-level JVM lock on commits (#2547)

But it's up to you, not sure what patches make the cut into the release docs. Thanks again for the call-out!

[marton-bod]

One more new feature to consider:
Hive: Vectorized ORC reads for Hive #2613

[cwsteinbach]

@jackye1995 @marton-bod I added the following PRs:
#2565, #2583, #2547, #2613.

@jackye1995 please take a look and approve if everything looks good. Thanks!

[jackye1995]

thank you for the changes! @danielcweeks any other comments on your side?

[rdblue]

I'm going to spend some time today going through commits. I got a start at it yesterday and found several things missing, including some that were caught here, so I'd like to make sure that we get it all.