tests: delete dead code in KeyChainFixture

Also sync GlobalConfiguration with NFD and reformat
the example configuration files.

Change-Id: Id1580eed30514bcbf2e0653635ccbf65dac24d58
diff --git a/client.conf.sample b/client.conf.sample
index f3bf724..8dab093 100644
--- a/client.conf.sample
+++ b/client.conf.sample
@@ -1,6 +1,5 @@
 {
-  "ca-list":
-  [
+  "ca-list": [
     {
       "ca-prefix": "/ndn",
       "certificate": "Bv0BSwcjCANuZG4IA0tFWQgIJ8SyKp97gScIA25kbjYIAAABgHX6c7QUCRgBAhkEADbugBVbMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEPuDnW4oq0mULLT8PDXh0zuBg+0SJ1yPC85jylUU+hgxX9fDNyjlykLrvb1D6IQRJWJHMKWe6TJKPUhGgOT658hZyGwEDHBYHFAgDbmRuCANLRVkICCfEsiqfe4En/QD9Jv0A/g8yMDIyMDQyOVQxNTM5NTD9AP8PMjAyNjEyMzFUMjM1OTU5/QECKf0CACX9AgEIZnVsbG5hbWX9AgIVTkROIFRlc3RiZWQgUm9vdCAyMjA0F0gwRgIhAPYUOjNakdfDGh5j9dcCGOz+Ie1MqoAEsjM9PEUEWbnqAiEApu0rg9GAK1LNExjLYAF6qVgpWQgU+atPn63Gtuubqyg="