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)
10 files changed