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/grafana.yml b/linux/system/repo/mcp/apt_mirantis/grafana.yml
index 73f8d15..694f26b 100644
--- a/linux/system/repo/mcp/apt_mirantis/grafana.yml
+++ b/linux/system/repo/mcp/apt_mirantis/grafana.yml
@@ -7,7 +7,7 @@
 #    system:
 #      repo:
 #        mcp_grafana:
-#          source: "deb [arch=amd64] http://mirror.mirantis.com/${_param:linux_system_repo_mcp_grafana_version}/grafana/${_param:linux_system_codename}/ jessie main"
+#          source: "deb [arch=amd64] https://mirror.mirantis.com/${_param:linux_system_repo_mcp_grafana_version}/grafana/${_param:linux_system_codename}/ jessie main"
 #          architectures: amd64
 #          key_id: C2E73424D59097AB
 #          key_server: keyserver.ubuntu.com