mgmt: moved signing into AppFace, code streamlining, and bug fixes

tests/management: improved callback validation

Fixed bad shared_ptr NULL checks
Fixed bad iterator decrement in InternalFace.sendInterest
Removed semi-useless constants in FibManager
Clarified ControlResponse text messages

Change-Id: Ic327a0b6b57827e401c7c3115d0ee92bae996a34
refs: #1138
diff --git a/daemon/mgmt/manager-base.hpp b/daemon/mgmt/manager-base.hpp
index fd3bcef..d62b1c0 100644
--- a/daemon/mgmt/manager-base.hpp
+++ b/daemon/mgmt/manager-base.hpp
@@ -8,7 +8,7 @@
 #define NFD_MGMT_MANAGER_BASE_HPP
 
 #include "common.hpp"
-#include <ndn-cpp-dev/security/key-chain.hpp>
+
 
 namespace nfd {
 
@@ -31,7 +31,6 @@
 
 protected:
   shared_ptr<AppFace> m_face;
-   ndn::KeyChain m_keyChain;
 };