security: Construct KeyChain from configuration file.

Change-Id: Iaddac24e2c4e199fdde83fa1d0067a87e18729c4
Refs: #1532
diff --git a/tests/security/config-file-home/.ndn/client.conf b/tests/security/config-file-home/.ndn/client.conf
new file mode 100644
index 0000000..cc05409
--- /dev/null
+++ b/tests/security/config-file-home/.ndn/client.conf
@@ -0,0 +1,2 @@
+pib=sqlite3
+tpm=file
\ No newline at end of file