Merge branch 'master' into fix-index-head

* master:
  Fix alias HEAD requests
  Upgrade to lucene-6.5.0-snapshot-f919485. (elastic#23087)
  Add BulkProcessor methods with XContentType parameter (elastic#23078)

Author: jasontedor

buildSrc/version.properties

@@ -1,6 +1,6 @@
 # When updating elasticsearch, please update 'rest' version in core/src/main/resources/org/elasticsearch/bootstrap/test-framework.policy
 elasticsearch     = 6.0.0-alpha1
-lucene            = 6.4.1
+lucene            = 6.5.0-snapshot-f919485
 
 # optional dependencies
 spatial4j         = 0.6

core/licenses/lucene-analyzers-common-6.4.1.jar.sha1

@@ -0,0 +1 @@
+886c1da9adc3347f61ab95ecbf4dbeeaa0e7acb2

core/licenses/lucene-analyzers-common-6.5.0-snapshot-f919485.jar.sha1

@@ -0,0 +1 @@
+df9e94f63ad7d9188f14820c435ea1dc3c28d87a

core/licenses/lucene-backward-codecs-6.4.1.jar.sha1

@@ -0,0 +1 @@
+3539f8dc9c3ed8ebe90afcb3daa2e9afcf5108d1

core/licenses/lucene-backward-codecs-6.5.0-snapshot-f919485.jar.sha1

@@ -0,0 +1 @@
+da76338e4f299963da9d7ab33dae7586dfc902c2