Previously this would default to the version of the remote Node.
However, if the remote cluster was mixed-version (e.g. it was part way through a
rolling upgrade), then the TransportService may have negotiated a connection
version that is not identical to connected Node's version.

This mismatch would cause the Stream and the (Remote)Connection to report
different version numbers, which could cause data to be sent over the wire
using an incorrect serialization version.

Previously this would default to the version of the remote Node.
However, if the remote cluster was mixed-version (e.g. it was part way through a
rolling upgrade), then the TransportService may have negotiated a connection
version that is not identical to connected Node's version.

This mismatch would cause the Stream and the (Remote)Connection to report
different version numbers, which could cause data to be sent over the wire
using an incorrect serialization version.

Previously this would default to the version of the remote Node.
However, if the remote cluster was mixed-version (e.g. it was part way through a
rolling upgrade), then the TransportService may have negotiated a connection
version that is not identical to connected Node's version.

This mismatch would cause the Stream and the (Remote)Connection to report
different version numbers, which could cause data to be sent over the wire
using an incorrect serialization version.

* master:
  Use Gradle wrapper when building BWC
  Painless: Add a simple cache for whitelist methods and fields. (elastic#28142)
  Fix upgrading indices which use a custom similarity plugin. (elastic#26985)
  Fix Licenses values for CDDL and Custom URL (elastic#27999)
  Cleanup TcpChannelFactory and remove classes (elastic#28102)
  Fix expected plugins test for transport-nio
  [Docs] Fix Date Math example descriptions (elastic#28125)
  Fail rollover if duplicated alias found in template (elastic#28110)
  Avoid concurrent snapshot finalizations when deleting an INIT snapshot (elastic#28078)
  Deprecate `isShardsAcked()` in favour of `isShardsAcknowledged()` (elastic#27819)
  [TEST] Wait for replicas to be allocated before shrinking
  Use the underlying connection version for CCS connections  (elastic#28093)
  test: do not use asn fields
  Test: Add assumeFalse for test that cannot pass on windows
  Clarify reproduce info on Windows
  Remove out-of-date projectile file

* master: (27 commits)
  Declare empty package dirs as output dirs
  Consistent updates of IndexShardSnapshotStatus (elastic#28130)
  Fix Gradle wrapper usage on Windows when building BWC (elastic#28146)
  [Docs] Fix some typos in comments (elastic#28098)
  Use Gradle wrapper when building BWC
  Painless: Add a simple cache for whitelist methods and fields. (elastic#28142)
  Fix upgrading indices which use a custom similarity plugin. (elastic#26985)
  Fix Licenses values for CDDL and Custom URL (elastic#27999)
  Cleanup TcpChannelFactory and remove classes (elastic#28102)
  Fix expected plugins test for transport-nio
  [Docs] Fix Date Math example descriptions (elastic#28125)
  Fail rollover if duplicated alias found in template (elastic#28110)
  Avoid concurrent snapshot finalizations when deleting an INIT snapshot (elastic#28078)
  Deprecate `isShardsAcked()` in favour of `isShardsAcknowledged()` (elastic#27819)
  [TEST] Wait for replicas to be allocated before shrinking
  Use the underlying connection version for CCS connections  (elastic#28093)
  test: do not use asn fields
  Test: Add assumeFalse for test that cannot pass on windows
  Clarify reproduce info on Windows
  Remove out-of-date projectile file
  ...