Test: Implement TLS fragment support in EAP TLS authentication.
Now that EAP tls fragmentation is supported, change tls authentication tests to the standard 2048 bits authentication mode.

Change-Id: I683c9bc441d5b965415fe4c97fbf84bf4e0a05e6
diff --git a/src/test/setup/radius-config/freeradius/radiusd.conf b/src/test/setup/radius-config/freeradius/radiusd.conf
index 2995b6b..327b10b 100644
--- a/src/test/setup/radius-config/freeradius/radiusd.conf
+++ b/src/test/setup/radius-config/freeradius/radiusd.conf
@@ -66,8 +66,8 @@
 #  Location of config and logfiles.
 confdir = ${raddbdir}
 modconfdir = ${confdir}/mods-config
-certdir = ${confdir}/certs_3
-cadir   = ${confdir}/certs_3
+certdir = ${confdir}/certs_2
+cadir   = ${confdir}/certs_2
 run_dir = ${localstatedir}/run/${name}
 
 # Should likely be ${localstatedir}/lib/radiusd