Fix nova-network dns nameservers assignment

Closes-bug: 1248172
partial revert of 8db6b816 and 946d5348
Catch new error messages for retry
Remove obsolete in havanna heat-cli package
Change savanna package and service names
Update murano for havanna
Fix swift output parse regexp

 - Bug #1248651
 - fix parse output with new swift havana release
 - fix optional whitespace at the end of the line
spec for new swift version