Punchlist for v0.12.1 release

[toddboom]

Make sure these items are merged and (if necessary), backported into the 0.12 branch before marking as completed.

• Refresh admin assets (Refresh admin assets #6225)
• Fix windows failure (Fix failure on Windows Windows does not allow a file to be renamed while its in use. f.Sync does not close the handle. It needs to be explicitly closed before renaming. #6260)
• Functions miss data with a WHERE time clause ([0.12] Functions miss data with a WHERE time clause #6229)
• Fix race on measurementFields (Fix race on measurementFields #6246)
• Handle nil values from the tsm1 cursor correctly (Handle nil values from the tsm1 cursor correctly #6239)
• Fix IO issues caused by CreateShardGroup bug (CreateShardGroup was incrementing meta data index even when it was idempotent #6259)
• Throw an error when an invalid expression is used with aux iterators (Throw an error when an invalid expression is used with aux iterators #6258)

[e-dard]

@toddboom I have got this list up-to-date

[jsternberg]

Removed the protobuf package rename from this issue since the change that caused that rename to be necessary is only in master, not 0.12.

[toddboom]

@jsternberg should we be looking at #6262 for the "Functions miss data with a WHERE time clause" issue?

[jsternberg]

I just updated the top issue with the appropriate PR that goes into 0.12 for that one.

[jsternberg]

@toddboom we should be good for testing 0.12.1 and then doing the final release if all goes well.

[toddboom]

awesome, thanks!

[jsternberg]

The downloads page is updated with 0.12.1. I'm going to close this issue.