Imports initializates cache in NetworkInterfaces. bnc#817797

Import into NetworkInterfaces didn't set an update flag. Imported data
could be overwritten by subsequent Read.

Normal SLES installation was not affected. Issue was observed for
OES which calls NetworkInterfaces::Read in an AddOn.
Updated changelog

Conflicts:
	VERSION
	package/yast2.changes
Merge pull request #89 from mchf/master

Imports initializates cache in NetworkInterfaces. bnc#817797