Synced with the RHEL FDP ovn-2021
    
    - Backports since 21.03.0-2 are:
    - e8e667dd92f3("controller: Monitor all logical flows that refer to datapath groups.")
    - 879ebc8c6419("tests: Fix frequent failure of "4 HV, 1 LS, 1 LR, packet test with HA distributed router gateway port:")
    - d7db8702e778("ovn-lib: harmonize stop_ovn_daemon() with ovs-lib")
    - f4b44655ec8f("ovn-ctl: stop databases with stop_ovn_daemon()")
    - d8b282b2852e("ovn-nbctl: dump next-hop for router policies")
    - f5a27f67d825("tests: Improve test "IGMP snoop/querier/relay")
    - 9c9b6b1d98e3("binding: Don't reset expected seqno for interfaces already being installed.")
    - 0038579d1928("northd: Optimize ct nat for load balancer traffic.")
    - 3bb91366a6b0("northd: Provide the option to not use ct.inv in lflows.")
    - 127bf166ccf4("northd: Support flow offloading for logical switches with no ACLs.")
    - 9cc334bc1a03("ovn-controller: Ensure br-int is using secure fail-mode")
    
    There is just one patch file ovn-21.03.0.patch which is a squash of all
    the commits.
    
    Signed-off-by: Numan Siddique <numans@ovn.org>