ovn: use bundled ovs

We are using the latest OVS, however, OVN needs to build using the
OVS submodule since some of the signatures don't work[1].

[1]: https://github.com/ovn-org/ovn/issues/128

Change-Id: I3ad7e5e80f1141c3d94f7ce7c8b8f8fdb9fb7c3c

lib/neutron_plugins/ovn_agent

@@ -320,8 +320,24 @@ function compile_ovn {
         ./boot.sh
     fi
 
+    # NOTE(mnaser): OVN requires that you build using the OVS from the
+    #               submodule.
+    #
+    #               https://github.com/ovn-org/ovn/blob/3fb397b63663297acbcbf794e1233951222ae5af/Documentation/intro/install/general.rst#bootstrapping
+    #               https://github.com/ovn-org/ovn/issues/128
+    git submodule update --init
+    pushd ovs
+    if [ ! -f configure ] ; then
+        ./boot.sh
+    fi
     if [ ! -f config.status ] || [ configure -nt config.status ] ; then
-        ./configure --with-ovs-source=$DEST/$OVS_REPO_NAME $prefix $localstatedir
+        ./configure
+    fi
+    make -j$(($(nproc) + 1))
+    popd
+
+    if [ ! -f config.status ] || [ configure -nt config.status ] ; then
+        ./configure $prefix $localstatedir
     fi
     make -j$(($(nproc) + 1))
     sudo make install