ci: don't use deprecated ndnsec commands

Change-Id: Ie85898f91fa44a22d87bb79aec7ebe4a7e5ef42e
diff --git a/.jenkins.d/20-tests.sh b/.jenkins.d/20-tests.sh
index 9ea3853..455c8f7 100755
--- a/.jenkins.d/20-tests.sh
+++ b/.jenkins.d/20-tests.sh
@@ -3,7 +3,7 @@
 
 # Prepare environment
 rm -rf ~/.ndn
-ndnsec-keygen "/tmp/jenkins/$NODE_NAME" | ndnsec-install-cert -
+ndnsec key-gen "/tmp/jenkins/$NODE_NAME" | ndnsec cert-install -
 
 # https://github.com/google/sanitizers/wiki/AddressSanitizerFlags
 ASAN_OPTIONS="color=always"