Merge branch 'stable-2.14' into stable-2.15

* stable-2.14:
  Set version to 2.14.19
  Upgrade JGit to 4.7.8.201903121755-r
  ElasticContainer: Update the 5.6 version to latest
  WORKSPACE: Update the testcontainers version to latest
  WORKSPACE: Fix the httpcore-nio reference typo

Change-Id: I51774ad17970ff753fb6f851e219d4479873cf09
diff --git a/WORKSPACE b/WORKSPACE
index dbdd442..c13c6d5 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -892,7 +892,7 @@
     sha1 = "76716d529710fc03d1d429b43e3cedd4419f78d4",
 )
 
-# When upgrading elasticsearch-rest-client, also upgrade http-niocore
+# When upgrading elasticsearch-rest-client, also upgrade httpcore-nio
 # and httpasyncclient as necessary.
 maven_jar(
     name = "elasticsearch-rest-client",