Coverity issues in VmFlowRef constructor

Coverity reports the following issues in the VmFlowRef(const VmFlowRef &rhs) constructor:

Using uninitialized value this->fd_(59780)
Non-static class member fd_ is not initialized in this constructor nor in any functions that it calls.
Non-static class member port_ is not initialized in this constructor nor in any functions that it calls.
Non-static class member flow_ is not initialized in this constructor nor in any functions that it calls. (59794).

Change-Id: Iaf29a87a0adc4746559a1ca9ddf3ee4fc6e41136
Closes-Bug: #1773354

src/vnsw/agent/pkt/flow_entry.cc

@@ -111,6 +111,11 @@ VmFlowRef::VmFlowRef() :
 }
 
 VmFlowRef::VmFlowRef(const VmFlowRef &rhs) {
+
+    fd_ = VmFlowRef::kInvalidFd;
+    port_ = 0;
+    flow_ = NULL;
+
     // UPDATE on linklocal flows is not supported. So, fd_ should be invalid
     assert(fd_ == VmFlowRef::kInvalidFd);
     assert(rhs.fd_ == VmFlowRef::kInvalidFd);