Use the common oslo-incubator rootwrap rather than maintain a
specific fork within Neutron.
- Migrated DnsmasqFilter use in dhcp.filters to the new EnvFilter
- Changed environment passing in ip_lib's netns.execute so that
it can be properly matched using IpNetNsExecFilter + EnvFilter.
It now calls "ip netns exec ns env A=B C=D command" instead of
"A=B C=D ip netns exec ns command". Adjusted tests accordingly.
All the other changes are coming directly from the Oslo "rootwrap"
module sync.
Notes:
- Neutron locates its rootwrap.conf in etc/ rather than in etc/neutron
- Neutron maintains a specific bin/quantum-rootwrap-xen-dom0 which
requires additional config in rootwrap.conf
Both behaviors were preserved in this commit, but this may need to be
addressed in the future to simplify future oslo-rootwrap updates.
Implements bp: quantum-common-rootwrap
Change-Id: I02879942a9d1169a71aa4d684c1b9ec109a6de32
042d15a314