Migration work of OFP He to Li

Ensure Migration of OFP from He to Li doesn't have any impact on L2switch.

Existing L2switch Migation patches :-
(for ,aster)
https://git.opendaylight.org/gerrit/#/c/33303/

(for stable/beryllium)
https://git.opendaylight.org/gerrit/#/c/33304/

Existing OFP Migation patches :-

>>> Lithium design. The patch is: *https://git.opendaylight.org/gerrit/#/c/35892
>>> <https://git.opendaylight.org/gerrit/#/c/35892>. *The purpose of this
>>> patch is for projects to identify issues in the migration and help OpenFlow

Corresponding email message:-
[1] https://jenkins.opendaylight.org/releng/view/autorelease/job/autorelease-project-report-boron/lastSuccessfulBuild/artifact/dependencies.log
[2] https://lists.opendaylight.org/pipermail/openflowplugin-dev/2016-April/004883.html
[3] https://docs.google.com/spreadsheets/d/1zImtd764e-hOgJAxoJKl85fxHCPu2agLfqsBtf13zQY/edit#gid=251530127

Please ensure l2switch is not affected because of OFP migration from He to Li