fw: Strategy::sendInterest allows changing Nonce

This commit also includes some tweaks in forwarding pipelines.

refs #1596

Change-Id: I65a4129be24089357b28fa9d35a3451e0d9ae258
diff --git a/daemon/table/strategy-info-host.hpp b/daemon/table/strategy-info-host.hpp
index 361eaaf..c7aa7da 100644
--- a/daemon/table/strategy-info-host.hpp
+++ b/daemon/table/strategy-info-host.hpp
@@ -41,7 +41,7 @@
 
   template<typename T>
   shared_ptr<T>
-  getStrategyInfo();
+  getStrategyInfo() const;
 
   template<typename T>
   shared_ptr<T>
@@ -68,7 +68,7 @@
 
 template<typename T>
 shared_ptr<T>
-StrategyInfoHost::getStrategyInfo()
+StrategyInfoHost::getStrategyInfo() const
 {
   return static_pointer_cast<T, fw::StrategyInfo>(m_strategyInfo);
 }