exclude: Fixes of Exclude and adding unit tests for the exclude filter

Change-Id: I2392d98abc1dd46fee53f2bb9206141a01aa37c3
fixes: #1158
diff --git a/src/exclude.cpp b/src/exclude.cpp
index 11edd82..42fb843 100644
--- a/src/exclude.cpp
+++ b/src/exclude.cpp
@@ -214,7 +214,7 @@
   Block::element_const_iterator i = wire_.getAll().begin();
   if (i->type() == Tlv::Any)
     {
-      appendExclude("/", true);
+      appendExclude(name::Component(), true);
       ++i;
     }