[sonic-swss] Add port auto negotiation support to swss (#1714)

1. Added port auto negotiation attributes handle
2. Get supported speeds for each port and save them to CONFIG_DB
3. Added new test cases in VS test to verify the change

orchagent/orchdaemon.cpp

@@ -105,7 +105,7 @@ bool OrchDaemon::init()
     };
 
     gCrmOrch = new CrmOrch(m_configDb, CFG_CRM_TABLE_NAME);
-    gPortsOrch = new PortsOrch(m_applDb, ports_tables, m_chassisAppDb);
+    gPortsOrch = new PortsOrch(m_applDb, m_stateDb, ports_tables, m_chassisAppDb);
     TableConnector stateDbFdb(m_stateDb, STATE_FDB_TABLE_NAME);
     gFdbOrch = new FdbOrch(m_applDb, app_fdb_tables, stateDbFdb, gPortsOrch);
 

orchagent/port.h

@@ -100,7 +100,7 @@ class Port
     uint32_t            m_mtu = DEFAULT_MTU;
     uint32_t            m_speed = 0;    // Mbps
     std::string         m_learn_mode = "hardware";
-    bool                m_autoneg = false;
+    int                 m_autoneg = -1;  // -1 means not set, 0 = disabled, 1 = enabled
     bool                m_admin_state_up = false;
     bool                m_init = false;
     bool                m_l3_vni = false;
@@ -133,6 +133,9 @@ class Port
     uint32_t  m_fdb_count = 0;
     uint32_t  m_up_member_count = 0;
     uint32_t  m_maximum_headroom = 0;
+    std::vector<uint32_t> m_adv_speeds;
+    sai_port_interface_type_t m_interface_type;
+    std::vector<uint32_t> m_adv_interface_types;
 
     /*
      * Following two bit vectors are used to lock