security: Pair-up Tpm and Pib in KeyChain

In this commit, we also change the HOME setting for test cases.

Change-Id: I7fa15461555b3519d9d2005c6956c167ed07d66f
Refs: #2242
Refs: #2260
diff --git a/tests/unit-tests/security/tmp-home/.ndn/client.conf b/tests/unit-tests/security/tmp-home/.ndn/client.conf
new file mode 100644
index 0000000..b832cfc
--- /dev/null
+++ b/tests/unit-tests/security/tmp-home/.ndn/client.conf
@@ -0,0 +1,2 @@
+pib=pib-sqlite3:/tmp/test/ndn-cxx/keychain
+tpm=tpm-file:/tmp/test/ndn-cxx/keychain
\ No newline at end of file