Update Gerrit image version

* update gerrit to 2019.2.6 with v2.15.17 version of Gerrit;
* set IGNORE_VERSIONCHECK var for Gerrit container, for
  full reindex data before start for upgrade [0,1]

[0] https://www.gerritcodereview.com/2.13.html#online-reindexing
[1] https://www.gerritcodereview.com/2.14.html#reindex-for-new-groups-index

Change-Id: I02924e49343ae1f2ecaa1c3409a9bf79df63120e
Related-Prod: PROD-33894
(cherry-picked from commit 27cc38cdacf32ec2311f4dedb0742398378f64a5)
diff --git a/defaults/docker_images.yml b/defaults/docker_images.yml
index ab513ce..c819c8b 100644
--- a/defaults/docker_images.yml
+++ b/defaults/docker_images.yml
@@ -12,8 +12,8 @@
     ###
     # phpldapadmin:0.6.12
     docker_image_phpldapadmin: "${_param:mcp_docker_registry}/mirantis/cicd/phpldapadmin:2019.2.5"
-    # gerrit:2.13.6
-    docker_image_gerrit: "${_param:mcp_docker_registry}/mirantis/cicd/gerrit:2019.2.5"
+    # gerrit:2.15.17
+    docker_image_gerrit: "${_param:mcp_docker_registry}/mirantis/cicd/gerrit:2019.2.7"
     # mysql:5.6
     docker_image_mysql: "${_param:mcp_docker_registry}/mirantis/cicd/mysql:${_param:mcp_version}"
     # jenkins:2.150.3
diff --git a/docker/swarm/stack/gerrit.yml b/docker/swarm/stack/gerrit.yml
index ed90acf..d1a5aa7 100644
--- a/docker/swarm/stack/gerrit.yml
+++ b/docker/swarm/stack/gerrit.yml
@@ -51,6 +51,7 @@
                 GERRIT_ADMIN_PWD: ${_param:gerrit_admin_password}
                 GERRIT_ADMIN_EMAIL: ${_param:gerrit_admin_email}
                 CANLOADINIFRAME: "true"
+                IGNORE_VERSIONCHECK: "false"
                 JAVA_OPTIONS: "-Djavax.net.ssl.trustStore=/etc/ssl/certs/java/cacerts ${_param:gerrit_extra_opts}"
                 https_proxy: ${_param:docker_https_proxy}
                 http_proxy: ${_param:docker_http_proxy}