adding missing example flows

source https://wiki.opendaylight.org/view/Editing_OpenDaylight_OpenFlow_Plugin:End_to_End_Flows:Example_Flows
especially mpls actions

Change-Id: I8257168dc190818451242fd1d8e0f80588c9f050
Signed-off-by: Peter Gubka <pgubka@cisco.com>
(cherry picked from commit ad808abb2e992f6e3f80e405155f461a75b304ac)
Merge "adding missing example flows" into stable/helium