tests: delete dead code in KeyChainFixture

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

Change-Id: Id1580eed30514bcbf2e0653635ccbf65dac24d58
diff --git a/libndn-cert.pc.in b/libndn-cert.pc.in
index d4221e4..da9b0bc 100644
--- a/libndn-cert.pc.in
+++ b/libndn-cert.pc.in
@@ -7,4 +7,4 @@
 Version: @VERSION@
 Libs: -L${libdir} -lndn-cert
 Cflags: -I${includedir}
-Requires: libndn-cxx >= 0.7.1
\ No newline at end of file
+Requires: libndn-cxx >= 0.8.1