Add default variable for ubuntu repos

  * Fix keystorage classes include

Change-Id: I2eb60bc1b828f797c1a118b3ca08e20da7fe66e0
diff --git a/linux/system/repo/mcp/apt_mirantis/jenkins.yml b/linux/system/repo/mcp/apt_mirantis/jenkins.yml
index 71070d7..b967e4a 100644
--- a/linux/system/repo/mcp/apt_mirantis/jenkins.yml
+++ b/linux/system/repo/mcp/apt_mirantis/jenkins.yml
@@ -1,5 +1,5 @@
 classes:
-- system.repo.keystorage.jenkins
+- system.linux.system.repo.keystorage.jenkins
 parameters:
   _param:
     apt_mk_version: stable