Build velia daemon

Introduce package for velia, configure build and systemd services.
Removes czechlight LEDs boot service.

Change-Id: I84d724918a3a6c7654eb113abce4d7068d7770a6
Co-authored-by: Jan Kundrát <kundrat@cesnet.cz>
diff --git a/.zuul.yaml b/.zuul.yaml
index c02b612..d5c7540 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -12,6 +12,7 @@
       - CzechLight/cla-sysrepo
       - CzechLight/gammarus
       - CzechLight/netconf-cli
+      - CzechLight/velia
       - github/CESNET/libyang
       - github/sysrepo/libredblack
       - github/sysrepo/sysrepo