* master:
QA: Add xpack tests to rolling upgrade (#30795)
Modify state of VerifyRepositoryResponse for bwc (#30762)
Reduce CLI scripts to one-liners on Windows (#30772)
Simplify number of shards setting (#30783)
Replace Request#setHeaders with addHeader (#30588)
[TEST] remove endless wait in RestClientTests (#30776)
[Docs] Fix script-fields snippet execution (#30693)
Upgrade to Lucene-7.4.0-snapshot-cc2ee23050 (#30778)
[DOCS] Add SAML configuration information (#30548)
[DOCS] Remove X-Pack references from SQL CLI (#30694)
Make http pipelining support mandatory (#30695)
[Docs] Fix typo in circuit breaker docs (#29659)
[Feature] Adding a char_group tokenizer (#24186)
[Docs] Fix broken cross link in documentation
Test: wait for netty threads in a JUnit ClassRule (#30763)
Increase the maximum number of filters that may be in the cache. (#30655)
[Security] Include an empty json object in an json array when FLS filters out all fields (#30709)
[TEST] Wait for CS to be fully applied in testDeleteCreateInOneBulk
Add more yaml tests for get alias API (#29513)
Ignore empty completion input (#30713)
[DOCS] fixed incorrect default
[ML] Filter undefined job groups from update calendar actions (#30757)
Fix docs failure on language analyzers (#30722)
[Docs] Fix inconsistencies in snapshot/restore doc (#30480)
Enable installing plugins from snapshots.elastic.co (#30765)
Remove fedora 26, add 28 (#30683)
Accept Gradle build scan agreement (#30645)
Remove logging from elasticsearch-nio jar (#30761)
Add Delete Repository High Level REST API (#30666)
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