Refine syntax: expose overloaded inherited functions (sonic-net#376)

Author: qiluo-msft

cfgmgr/intfmgr.h

@@ -14,6 +14,7 @@ class IntfMgr : public Orch
 {
 public:
     IntfMgr(DBConnector *cfgDb, DBConnector *appDb, DBConnector *stateDb, const vector<string> &tableNames);
+    using Orch::doTask;
 
 private:
     ProducerStateTable m_appIntfTableProducer;

cfgmgr/intfmgrd.cpp

@@ -75,7 +75,7 @@ int main(int argc, char **argv)
             }
             if (ret == Select::TIMEOUT)
             {
-               ((Orch *)&intfmgr)->doTask();
+                intfmgr.doTask();
                 continue;
             }
 

cfgmgr/vlanmgr.cpp

@@ -167,12 +167,11 @@ bool VlanMgr::removeHostVlanMember(int vlan_id, const string &port_alias)
 
 bool VlanMgr::isVlanMacOk()
 {
-    return !(!gMacAddress);
+    return !!gMacAddress;
 }
 
 void VlanMgr::doVlanTask(Consumer &consumer)
 {
-
     if (!isVlanMacOk())
     {
         SWSS_LOG_DEBUG("VLAN mac not ready, delaying VLAN task");

cfgmgr/vlanmgr.h

@@ -15,6 +15,7 @@ class VlanMgr : public Orch
 {
 public:
     VlanMgr(DBConnector *cfgDb, DBConnector *appDb, DBConnector *stateDb, const vector<string> &tableNames);
+    using Orch::doTask;
 
 private:
     ProducerStateTable m_appVlanTableProducer, m_appVlanMemberTableProducer;

cfgmgr/vlanmgrd.cpp

@@ -90,7 +90,7 @@ int main(int argc, char **argv)
             }
             if (ret == Select::TIMEOUT)
             {
-                ((Orch *)&vlanmgr)->doTask();
+                vlanmgr.doTask();
                 continue;
             }