Fix nova-network dns nameservers assignment

Closes-bug: 1248172
Merge pull request #789 from aglarendil/havana

Fix nova-network dns nameservers assignment
Remove obsolete in havanna heat-cli package
Change savanna package and service names
Update murano for havanna
partial revert of 8db6b816 and 946d5348
Merge pull request #792 from xdel/fix-crappy-hack

partial revert of 8db6b816 and 946d5348
Catch new error messages for retry
Merge pull request #804 from xenolog/PR1

Catch new error messages for retry Neutron API call
Merge pull request #791 from dmitryilyin/havana

Update Murano and Heat for Havana
havana syntax fix
Merge pull request #819 from Mirantis/havana_syntax_fix

havana syntax fix
Merge branch 'havana' of github.com:Mirantis/fuel into swift_havana