Simon Willnauer a96f3d46b7 Add field with dot in name to 2.4+ static bwc indexes (#20360)
This change adds a `field.with.dots` to all 2.4 bwc indicse and above.
It also adds verification code to OldIndexBackwardsCompatibilityIT to
ensure we upgrade the indices cleanly and the field is present.

Closes #19956
2016-09-07 17:21:28 +02:00
..
2016-08-30 13:31:24 -04:00