lib/quantum: refactor quantum plugins and third party

As quantum plugin support is coming like floodlight, nvp and nec,
it's worth while to refactor quantum plugin logic so that each plugin can
be modified/enhanced intervening with other quantum plugin.
And new plugin support can be added easily (hopefully) without modifying
core logic.

Change-Id: Ic5ab5b993272fdd3b4e779823323777a845ee681
diff --git a/lib/quantum_plugins/bigswitch_floodlight b/lib/quantum_plugins/bigswitch_floodlight
new file mode 100644
index 0000000..35276a5
--- /dev/null
+++ b/lib/quantum_plugins/bigswitch_floodlight
@@ -0,0 +1,55 @@
+# Quantum Big Switch/FloodLight plugin
+# ------------------------------------
+
+# Save trace setting
+XTRACE=$(set +o | grep xtrace)
+set +o xtrace
+
+source $TOP_DIR/lib/quantum_plugins/ovs_base
+source $TOP_DIR/lib/quantum_thirdparty/bigswitch_floodlight     # for third party service specific configuration values
+
+function quantum_plugin_create_nova_conf() {
+    NOVA_VIF_DRIVER=${NOVA_VIF_DRIVER:-"nova.virt.libvirt.vif.LibvirtHybridOVSBridgeDriver"}
+}
+
+function quantum_plugin_install_agent_packages() {
+    _quantum_ovs_base_install_agent_packages
+}
+
+function quantum_plugin_configure_common() {
+    Q_PLUGIN_CONF_PATH=etc/quantum/plugins/bigswitch
+    Q_PLUGIN_CONF_FILENAME=restproxy.ini
+    Q_DB_NAME="restproxy_quantum"
+    Q_PLUGIN_CLASS="quantum.plugins.bigswitch.plugin.QuantumRestProxyV2"
+    BS_FL_CONTROLLERS_PORT=${BS_FL_CONTROLLERS_PORT:-localhost:80}
+    BS_FL_CONTROLLER_TIMEOUT=${BS_FL_CONTROLLER_TIMEOUT:-10}
+}
+
+function quantum_plugin_configure_debug_command() {
+    _quantum_ovs_base_configure_debug_command
+}
+
+function quantum_plugin_configure_dhcp_agent() {
+    :
+}
+
+function quantum_plugin_configure_l3_agent() {
+    _quantum_ovs_base_configure_l3_agent
+}
+
+function quantum_plugin_configure_plugin_agent() {
+    :
+}
+
+function quantum_plugin_configure_service() {
+    iniset /$Q_PLUGIN_CONF_FILE RESTPROXY servers $BS_FL_CONTROLLERS_PORT
+    iniset /$Q_PLUGIN_CONF_FILE RESTPROXY servertimeout $BS_FL_CONTROLLER_TIMEOUT
+}
+
+function quantum_plugin_setup_interface_driver() {
+    local conf_file=$1
+    iniset $conf_file DEFAULT interface_driver quantum.agent.linux.interface.OVSInterfaceDriver
+}
+
+# Restore xtrace
+$XTRACE