Security update for openvswitch (important)

This update for openvswitch fixes the following issues:

• CVE-2017-9263: OpenFlow role status message can cause a call to abort()
  leading to application crash (bsc#1041470)

• CVE-2017-9265: Buffer over-read while parsing message could lead to
  crash or maybe arbitrary code execution (bsc#1041447)

• Do not restart the ovs-vswitchd and ovsdb-server services
  on package updates (bsc#1002734)

• Do not restart the ovs-vswitchd, ovsdb-server and openvswitch services
  on package removals. This facilitates potential future package moves but
  also preserves connectivity when the package is removed (bsc#1050896)