Modifications for Ubuntu 13.10:
* Add .conf suffix to apache2 config files. In Ubuntu 13.10,
files in sites-available should have ".conf" suffix.
Otherwise it is not recognized by a2ensite.
* libglib2.0-dev is added to lib/files/apt/trema. Trema is
an OpenFlow controler framework used by Neutron NEC plugin
Ubuntu package dependency seems to be changed.
Minor cleanups are also done in OVS configuration:
* Set datapath_id before connecting to the OpenFlow controller
to ensure datapath_id changes after connected.
Previously datapath_id is changed after connecting to the controller.
* Drop "0x" prefix from datapath_id passed to OVS.
OVS ignores datapath_id with 0x prefix.
* Fix a bug that SKIP_OVS_BRIDGE_SETUP skips all confiugration of
the plugin agent. It should skip only OVS setup.
Change-Id: Ifac3def8decda577b5740c82fe8d24e8520c7777
7a4ae3d242