Revert "Bug 1764 - moved Session related interfaces to openflowplugin-api"

This reverts commit 2b019317a1a1ecd65be0fb6ed9fc3c2a291a38f8.

Change-Id: Id807a0abe78c15e2436b38a856af1193f0c416a6
Signed-off-by: Michal Rehak <mirehak@cisco.com>
Merge "Revert "Bug 1764 - moved Session related interfaces to openflowplugin-api"" into stable/helium