mgmt+core: Moving SegmentPublisher to core/ and removing KeyChain from nfd::AppFace

This change ensures interface uniformity between nfd::AppFace and
ndn::Face and allow now templated version of SegmentPublisher to be used
with either.

Change-Id: I82e29528b13b37bd2ae27ef47db30e8c87c15a38
Refs: #1749
diff --git a/daemon/mgmt/channel-status-publisher.cpp b/daemon/mgmt/channel-status-publisher.cpp
index c212f72..8abe2fb 100644
--- a/daemon/mgmt/channel-status-publisher.cpp
+++ b/daemon/mgmt/channel-status-publisher.cpp
@@ -37,9 +37,10 @@
 
 
 ChannelStatusPublisher::ChannelStatusPublisher(const FactoryMap& factories,
-                                               shared_ptr<AppFace> face,
-                                               const Name& prefix)
-  : SegmentPublisher(face, prefix)
+                                               AppFace& face,
+                                               const Name& prefix,
+                                               ndn::KeyChain& keyChain)
+  : SegmentPublisher(face, prefix, keyChain)
   , m_factories(factories)
 {