Backport to 4.0 following issues:

Closes-bug: #1279809

  #1275132 c82d4edd66701
  #1271274 244acdaab1050
  #1277112 078efe67207a4
  #1275132 7776ffe6fd94b6
  #1277147 0ba23e1a6a1a8c, 5fd706f58ab120b32
  #1274789 b8105f58bcb28
  #1278718 48e8c25aa484e

* Update l3_if_downup to eval carrier state when starting
* Allow more than two interfaces in the OVS bonds.
* FIX: incorrect condition in l23network bond type
* Fix un-changeable resource in l3_if_downup
* FIX: L23network module can't get one-element array as bond parameter
* FIX errors while print error massage.
* L23network: allow setup MTU in the network_schema
* Get Ordering of ifconfig operations from transformation order if it possible.

Change-Id: I2fa29b72188dc7798eaf9c388cf46b831a5a38c9