Switch all mirror repos to https

This patch updates all repos in reclass-system for mirror.mirantis.com
to use https scheme.

Change-Id: Ic48207caf5746f8e9395e4b5552a6b9c8df49a92
Related-Prod:  PROD-27431
diff --git a/linux/system/repo/mcp/apt_mirantis/sensu.yml b/linux/system/repo/mcp/apt_mirantis/sensu.yml
index 89e1501..56e4599 100644
--- a/linux/system/repo/mcp/apt_mirantis/sensu.yml
+++ b/linux/system/repo/mcp/apt_mirantis/sensu.yml
@@ -5,7 +5,7 @@
     system:
       repo:
         mcp_sensu:
-          source: "deb [arch=amd64] http://mirror.mirantis.com/${_param:linux_system_repo_mcp_sensu_version}/sensu/${_param:linux_system_codename}/ sensu main"
+          source: "deb [arch=amd64] https://mirror.mirantis.com/${_param:linux_system_repo_mcp_sensu_version}/sensu/${_param:linux_system_codename}/ sensu main"
           architectures: amd64
           key_id: A20F259AEB9C94BB
           key_server: keyserver.ubuntu.com