Change docker_image_cvp_sanity_checks to 2019.2.18

Change-Id: I6036f32466f40a8c27f1903d6584fb5a62fce237
diff --git a/.gitreview b/.gitreview
index 3ff18c8..f84fc6e 100644
--- a/.gitreview
+++ b/.gitreview
@@ -2,3 +2,4 @@
 host=gerrit.mcp.mirantis.com
 port=29418
 project=salt-models/reclass-system.git
+defaultbranch=release/proposed/2019.2.0