debmirror updates

  * Add :
    - elasticsearch-6.x - include by default
    - salt-formulas     - include by default
    - opencontrail-4.0
    - opencontrail-4.1
  * Update:
    - ubuntu - update regex
      - drop old 4.4.0 kernels
    - elasticsearch-5.x|percona|extra - update regexp

Prod-related: PROD-26226 (PROD:26226)

Change-Id: Ic6a02d1c1d735794cc8ec94707b8f06a4f83c759
(cherry picked from commit a75ee02bfb0ae8fb5d2fbb2e414e0b836193067c)
diff --git a/debmirror/mirror_mirantis_com/init.yml b/debmirror/mirror_mirantis_com/init.yml
index bf7858a..68f7530 100644
--- a/debmirror/mirror_mirantis_com/init.yml
+++ b/debmirror/mirror_mirantis_com/init.yml
@@ -3,6 +3,7 @@
 - system.debmirror.mirror_mirantis_com.ceph-luminous.xenial
 - system.debmirror.mirror_mirantis_com.docker.xenial
 - system.debmirror.mirror_mirantis_com.elasticsearch-5.x.xenial
+- system.debmirror.mirror_mirantis_com.elasticsearch-6.x.xenial
 - system.debmirror.mirror_mirantis_com.elasticsearch-curator-5.xenial
 - system.debmirror.mirror_mirantis_com.extra.xenial
 - system.debmirror.mirror_mirantis_com.glusterfs-3.8.xenial
@@ -10,6 +11,7 @@
 - system.debmirror.mirror_mirantis_com.openstack-pike.xenial
 - system.debmirror.mirror_mirantis_com.openstack-queens.xenial
 - system.debmirror.mirror_mirantis_com.percona.xenial
+- system.debmirror.mirror_mirantis_com.salt-formulas.xenial
 - system.debmirror.mirror_mirantis_com.saltstack-2017.7.xenial
 - system.debmirror.mirror_mirantis_com.td-agent.xenial
 - system.debmirror.mirror_mirantis_com.ubuntu.xenial