Temp. disable debmirror caching

Prod-relate: PROD-26267 (PROD:26267)

Change-Id: I56e7f49176a8829af8bfcb600192ad099ffafa7a
(cherry picked from commit a0f868e2f233a39a129608327a4f422f586cf727)
diff --git a/debmirror/mirror_mirantis_com/ubuntu/xenial.yml b/debmirror/mirror_mirantis_com/ubuntu/xenial.yml
index 30fbea5..a875544 100644
--- a/debmirror/mirror_mirantis_com/ubuntu/xenial.yml
+++ b/debmirror/mirror_mirantis_com/ubuntu/xenial.yml
@@ -16,7 +16,8 @@
           log_file: "/var/log/debmirror/mirror_mirantis_com_ubuntu_xenial.log"
           dist: [ xenial , xenial-security, xenial-updates ]
           section: [ main , restricted, universe ]
-          cache_dir: "${_param:debmirror_mirrors_base_target_dir}/../.cache/ubuntu"
+          # FIXME uncomment after PROD-26267 will be fixed
+          # cache_dir: "${_param:debmirror_mirrors_base_target_dir}/../.cache/ubuntu"
           # Don't exclude main/x11 - its required for many pkgs.
           exclude_deb_section:
           - Xfce