Install agent packages when running the Nicira plugin.

This is necessary because currently the plugin uses the dhcp amongst
other agents.

Fixes bug #1190057

Change-Id: If9e79de2cf547076e0cac7ac0f71c9fb7fc2758f
Merge "Install agent packages when running the Nicira plugin."
Merge remote-tracking branch 'm_src_repo/citrix-fixes' into build-temp