NCCLIENT_REPO is using the wrong url

NCCLIENT_REPO value in lib/neutron_plugins/cisco is pointing to a repo
that does not exist. This fix corrects the url.

Closes-Bug #1286302

Change-Id: I42db0b3f7a4bbf5d1d053e3da8b4fbb67d47de94
Merge "NCCLIENT_REPO is using the wrong url"