Merge branch 'stable-3.7' into stable-3.8

* stable-3.7:
  Use index on ChangeNotes which supports local and imported changes
  Consume global-refdb from source
  Add global-refdb libModule to high-available Docker test
  Remove syslog-sidecar volume in Docker test
  Bump Gerrit to v3.7.7 in Docker tests
  Fix docker-based tests

Change-Id: I41fc19f7a2012c7cd2ef96053d8999395b564d40

.gitignore

diff --git a/.gitignore b/.gitignore
index 64f8b81..f4aac45 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,8 @@
 /src/test/docker/gitvolume
 /src/test/docker/pgdata
 /src/test/docker/shareddir
+
+# IntelliJ files
+.idea
+*.iml
+