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
diff --git a/lib/quantum_plugins/nicira b/lib/quantum_plugins/nicira
index 7795eed..d274723 100644
--- a/lib/quantum_plugins/nicira
+++ b/lib/quantum_plugins/nicira
@@ -34,8 +34,8 @@
 }
 
 function quantum_plugin_install_agent_packages() {
-    # Nicira Plugin does not run q-agt
-    :
+    # Nicira Plugin does not run q-agt, but it currently needs dhcp and metadata agents
+    _quantum_ovs_base_install_agent_packages
 }
 
 function quantum_plugin_configure_common() {