Instead of having OVSCookieBridge as a passthrough class that does not
provide the intended behavior (see bug 1557620), this change implements
a cookie bridge as a patched copy of the underlying bridge:
- the underlying bridge is copied
- the copy is given an extension-specific cookie
The 'extension bridge should only touch its flows' effect is obtained
by a separate change (Idd0531cedda87224531cb8fb6a912ccd0f1554d5).
The two problems in the bug are addressed:
- the extension-specific cookie is now applied even for calls to
methods other than add/delete/mod_flows
- the extension-specific cookie is now applied in the case of the
native/ryu implementation
This commit also re-enable the use of uninstall_flows in the QoS OVS driver,
which had to be disabled in Idd0531cedda87224531cb8fb6a912ccd0f1554d5, but
can now be re-enabled with this bug addressed.
This change complements the unit tests to confirm that the bug is
fixed.
Change-Id: I55835a34d8fba7a139dce93f99cbff54584d695c
Closes-Bug: #1557620
Needed-By: I8570441a0b8d5ee3ad7f88e07affac2f1b782021
106f6507db