Upgrade to a Lucene 7 snapshot (#24089)

We want to upgrade to Lucene 7 ahead of time in order to be able to check whether it causes any trouble to Elasticsearch before Lucene 7.0 gets released. From a user perspective, the main benefit of this upgrade is the enhanced support for sparse fields, whose resource consumption is now function of the number of docs that have a value rather than the total number of docs in the index.

Some notes about the change:
 - it includes the deprecation of the `disable_coord` parameter of the `bool` and `common_terms` queries: Lucene has removed support for coord factors
 - it includes the deprecation of the `index.similarity.base` expert setting, since it was only useful to configure coords and query norms, which have both been removed
 - two tests have been marked with `@AwaitsFix` because of #23966, which we intend to address after the merge

2 files changed, 1 insertions, 1 deletions

diff --git a/plugins/analysis-stempel/licenses/lucene-analyzers-stempel-6.5.0.jar.sha1 b/plugins/analysis-stempel/licenses/lucene-analyzers-stempel-6.5.0.jar.sha1
deleted file mode 100644
index 9a1387fa22..0000000000
--- a/plugins/analysis-stempel/licenses/lucene-analyzers-stempel-6.5.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-894c42c011d291e72d14db660499c75281de9efd
\ No newline at end of file
diff --git a/plugins/analysis-stempel/licenses/lucene-analyzers-stempel-7.0.0-snapshot-89f6d17.jar.sha1 b/plugins/analysis-stempel/licenses/lucene-analyzers-stempel-7.0.0-snapshot-89f6d17.jar.sha1
new file mode 100644
index 0000000000..c845088ffb
--- /dev/null
+++ b/plugins/analysis-stempel/licenses/lucene-analyzers-stempel-7.0.0-snapshot-89f6d17.jar.sha1
@@ -0,0 +1 @@
+a41c22ef7dd43991e1f3555ff527ac79eb47fdca
\ No newline at end of file