fw: eliminate fibEntry in Strategy API

Strategy::lookupFib can be used to obtain FIB entry.
FIB lookup is skipped when strategy does not need it.

refs #3205

Change-Id: Icba67229cbc261d9def44ffa91461ea4b09982b2
diff --git a/daemon/table/fib-entry.hpp b/daemon/table/fib-entry.hpp
index 0536fc5..9106d9f 100644
--- a/daemon/table/fib-entry.hpp
+++ b/daemon/table/fib-entry.hpp
@@ -50,7 +50,7 @@
 /** \class Entry
  *  \brief represents a FIB entry
  */
-class Entry : public enable_shared_from_this<Entry>, noncopyable
+class Entry : noncopyable
 {
 public:
   explicit