Reduce usage of std::bind()

C++14 lambdas are easier to read, easier to debug,
and can usually be better optimized by the compiler.

Change-Id: I294f275904f91942a8de946fe63e77078a7608a6
diff --git a/tests/daemon/fw/unsolicited-data-policy.t.cpp b/tests/daemon/fw/unsolicited-data-policy.t.cpp
index bc95d4f..5c8c8ad 100644
--- a/tests/daemon/fw/unsolicited-data-policy.t.cpp
+++ b/tests/daemon/fw/unsolicited-data-policy.t.cpp
@@ -58,8 +58,8 @@
 
     tribool isFound = indeterminate;
     cs.find(Interest(data.getFullName()),
-            bind([&] { isFound = true; }),
-            bind([&] { isFound = false; }));
+            [&] (auto&&...) { isFound = true; },
+            [&] (auto&&...) { isFound = false; });
 
     this->advanceClocks(1_ms);
     BOOST_REQUIRE(!indeterminate(isFound));