Update mirrors from apt to mirror.mirantis.com

Change-Id: I856859a7bf2a1cc2d12fcb965e3b69c2a580cd2f
diff --git a/day01-image/template.json b/day01-image/template.json
index 455ed14..a862869 100644
--- a/day01-image/template.json
+++ b/day01-image/template.json
@@ -14,7 +14,7 @@
     "ubuntu_baseurl": "{{ env `UBUNTU_BASEURL` }}",
     "saltstack_gpg": "{{ env `SALTSTACK_GPG` }}",
     "saltstack_repo": "{{ env `SALTSTACK_REPO` }}",
-    "apt_mirantis_gpg": "{{ env `APT_MIRANTIS_GPG` }}",
+    "apt_mirantis_gpg": "{{ env `APT_MIRANTIS_SALT_GPG` }}",
     "apt_mirantis_salt_repo": "{{ env `APT_MIRANTIS_SALT_REPO` }}",
     "git_salt_formulas_scripts": "{{ env `GIT_SALT_FORMULAS_SCRIPTS` }}"
   },
@@ -53,7 +53,7 @@
         "BS_HOSTNAME={{ user `bs_hostname` }}",
         "SALTSTACK_GPG={{ user `saltstack_gpg` }}",
         "SALTSTACK_REPO={{ user `saltstack_repo` }}",
-        "APT_MIRANTIS_GPG={{ user `apt_mirantis_gpg` }}",
+        "APT_MIRANTIS_SALT_GPG={{ user `apt_mirantis_gpg` }}",
         "APT_MIRANTIS_SALT_REPO={{ user `apt_mirantis_salt_repo` }}",
         "GIT_SALT_FORMULAS_SCRIPTS={{ user `git_salt_formulas_scripts` }}",
         "APT_MIRANTIS_SALT_REPO={{ user `apt_mirantis_salt_repo` }}",