Align ovs version with Stein UCA

Bump ovs to 2.11.1 to ensure alignment with Stein Cloud Archive.

This also means that the patches for OVS can be dropped as the
change was included in the 2.11.1 release.

Change-Id: I9896f1dbd80a2344565a752d6c697f0a3219c210

patches/openvswitch/0001-ovs-kmod-ctl-source-ovs-lib-dynamically.patch

@@ -1,31 +0,0 @@
-From fdf38dcad424c00d39b5c128ddb06b93606a639b Mon Sep 17 00:00:00 2001
-From: James Page <james.page@ubuntu.com>
-Date: Wed, 19 Sep 2018 09:13:48 +0200
-Subject: [PATCH] ovs-kmod-ctl: source ovs-lib dynamically
-
-Determine installation location of ovs-lib using runtime location
-of script, rather than build-time parameters.
----
- utilities/ovs-kmod-ctl.in | 6 +++++-
- 1 file changed, 5 insertions(+), 1 deletion(-)
-
-diff --git a/utilities/ovs-kmod-ctl.in b/utilities/ovs-kmod-ctl.in
-index 13ccfcf73..19f100964 100644
---- a/utilities/ovs-kmod-ctl.in
-+++ b/utilities/ovs-kmod-ctl.in
-@@ -14,7 +14,11 @@
- # See the License for the specific language governing permissions and
- # limitations under the License.
- 
--. "@pkgdatadir@/scripts/ovs-lib" || exit 1
-+case $0 in
-+    */*) dir0=`echo "$0" | sed 's,/[^/]*$,,'` ;;
-+    *) dir0=./ ;;
-+esac
-+. "$dir0/ovs-lib" || exit 1
- 
- for dir in "$sbindir" "$bindir" /sbin /bin /usr/sbin /usr/bin; do
-     case :$PATH: in
--- 
-2.17.1
-

snapcraft.yaml

@@ -485,8 +485,7 @@ parts:
       - -*
 
   openvswitch:
-    # TODO: figure out a better way to fetch the version
-    source: http://openvswitch.org/releases/openvswitch-2.10.2.tar.gz
+    source: http://openvswitch.org/releases/openvswitch-2.11.1.tar.gz
     plugin: autotools
     build-packages:
       - libssl-dev
@@ -505,18 +504,6 @@ parts:
       - "--sysconfdir=/var/snap/$SNAPCRAFT_PROJECT_NAME/etc"
     after:
       - patches
-    override-build: |
-      # Apply patches
-      for patch in ${SNAPCRAFT_STAGE}/patches/openvswitch/*.patch; do
-        echo "Applying $(basename "$patch") ..."
-        patch \
-          --batch \
-          --forward \
-          --strip 1 \
-          --input "$patch"
-        echo
-      done
-      snapcraftctl build
 
   ovs-wrapper:
     source: ./snap-wrappers/ovs