Deleted flow cache in vlrouter when removing local endpoint

[zhouzijiang]

Description of the changes

Type of fix: Bug Fix

Please describe:

• changes made in the Pull request deleted flow cache in vlrouter when removing local endpoint, or the flow cache in vlrouter will never be deleted.
• type of testing done (both manual and automated) manual test have been done.

  TODO

• [ ] Tests
• [ ] Documentation

[zhouzijiang]

@tiewei please review it, thanks!

[tiewei]

usually updating vendor codes are not allowed in golang project

[vhosakot]

usually updating vendor codes are not allowed in golang project

I agree, I'd update ofnet in godep (https://github.com/contiv/netplugin/blob/master/Godeps/Godeps.json) to the right git sha.

[zhouzijiang]

@tiewei @vhosakot ok, I wil create a pull request in ofnet repository