Upgrade to lucene-7.0.0-snapshot-ad2cb77. (#25349)

Most notable changes:
 - better update concurrency: LUCENE-7868
 - TopDocs.totalHits is now a long: LUCENE-7872
 - QueryBuilder does not remove the boolean query around multi-term synonyms:
   LUCENE-7878
 - removal of Fields: LUCENE-7500

For the `TopDocs.totalHits` change, this PR relies on the fact that the encoding
of vInts and vLongs are compatible: you can write and read with any of them as
long as the value can be represented by a positive int.

1 files changed, 7 insertions, 5 deletions

diff --git a/test/framework/src/main/java/org/elasticsearch/test/engine/ThrowingLeafReaderWrapper.java b/test/framework/src/main/java/org/elasticsearch/test/engine/ThrowingLeafReaderWrapper.java
index 314f1b5285..1d89fc981f 100644
--- a/test/framework/src/main/java/org/elasticsearch/test/engine/ThrowingLeafReaderWrapper.java
+++ b/test/framework/src/main/java/org/elasticsearch/test/engine/ThrowingLeafReaderWrapper.java
@@ -81,12 +81,14 @@ public class ThrowingLeafReaderWrapper extends FilterLeafReader {
         this.thrower = thrower;
     }
 
-
     @Override
-    public Fields fields() throws IOException {
-        Fields fields = super.fields();
-        thrower.maybeThrow(Flags.Fields);
-        return fields == null ? null : new ThrowingFields(fields, thrower);
+    public Terms terms(String field) throws IOException {
+        Terms terms = super.terms(field);
+        if (thrower.wrapTerms(field)) {
+            thrower.maybeThrow(Flags.Terms);
+            return terms == null ? null : new ThrowingTerms(terms, thrower);
+        }
+        return terms;
     }
 
     @Override