Feature #2694: Improve ObjectCollection::from_xml_node

It could not parse xml with space between elements
(cherry picked from commit c026120a17659129e269ba25ce01ecdaea17ee01)
Bug #2839: Fsck now allows multiple system DS in the same cluster
Bug #2586: Remove formatting in fsck for Nokogiri docs. Contributed by Rolandas Naujikas
Bug #2586: Do not remove attibutes with space values
Reset current network when the map is updated

(cherry picked from commit 9d76ac09613eaf0eb78a31add19bec16e048a59a)
bug #2844: Support em interface names in kvm-probes.d/kvm.rb

(cherry picked from commit 395b20830a93472e0e734abfb0ad707e4ec97671)
Revert "Bug #2586: Do not remove attibutes with space values"

This reverts commit 8277a09b1e0aef92db714e30ba6211738d9b6499.
Revert "Bug #2586: Remove formatting in fsck for Nokogiri docs. Contributed by Rolandas Naujikas"

This reverts commit 0820cf86d77965453f7683e74d81277fd32f4838.
Bug #2586: Better nokogiri formatting options
Merge remote-tracking branch 'upstream/one-4.4' into one-4.4