if log_file enabled, ensure log_dir is not absent

If log_file is specified, that means we should configure log_dir.
Otherwise, when running a command which use debug (like db-sync commands), it will try to write logs in the user directory which is not the best way.

This patch aims to ensure that we configure log_dir instead of remove
the flag like it was before.

Partial-bug #1292619
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>

Change-Id: I94528b42a4865976f74d264facd91cb521c177bd
Add missing quotas parameters

Reasons:
- Some parameters are missing in the quota class

Changes:
- Add quota_health_monitor option
- Add quota_items option
- Add quota_member option
- Add quota_network_gateway option
- Add quota_packet_filter option
- Add quota_pool option
- Add quota_vip option

Change-Id: I1e2ebe2714b331652ed9031b21f06edb1dcc821b
Merge "if log_file enabled, ensure log_dir is not absent"
Merge "Add missing quotas parameters"
Fix network_vlan_ranges parameter for OVS plugin

Class neutron::plugins::ovs expects string value in network_vlan_ranges parameter,
but validate_network_vlan_ranges will fail when value is comma separated list
of valid values. This patch is fixing this problem

Change-Id: If5b8ef59a600b3204415853ad796fb0537fefe4a
Merge "Fix network_vlan_ranges parameter for OVS plugin"