openvswitch: rework packaging

New scheme mainly provides three packages: openvswitch,
openvswitch-ovn-north, openvswitch-ovn-controller.  These should fit
most usage scenarios.  Other subpackages like openvswitch-libXXX
etc.  are there for dependency management and are hidden from the
menu.

Many python and shell scripts are removed in this revision.  Most of
them cannot run out of box at all for lack of dependencies.  Others
being legacy ones are not that useful now.  Add them back at later time
when real need appears

Below are a simple listing of additions

 - initscript now incorporate also ovn north and controller support
 - ovn-ctl and ovs-ctl can be invoked directly from within $PATH

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

net/openvswitch/patches/0100-netdev-linux-Use-unsigned-int-for-ifi_flags.patch

@@ -10,11 +10,9 @@ Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
  lib/netdev-linux.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)
 
-diff --git a/lib/netdev-linux.c b/lib/netdev-linux.c
-index c0471be15..0750e5f2c 100644
 --- a/lib/netdev-linux.c
 +++ b/lib/netdev-linux.c
-@@ -2788,7 +2788,7 @@ update_flags(struct netdev_linux *netdev, enum netdev_flags off,
+@@ -2810,7 +2810,7 @@ update_flags(struct netdev_linux *netdev
               enum netdev_flags on, enum netdev_flags *old_flagsp)
      OVS_REQUIRES(netdev->mutex)
  {
@@ -23,6 +21,3 @@ index c0471be15..0750e5f2c 100644
      int error = 0;
  
      old_flags = netdev->ifi_flags;
--- 
-2.16.2
-