Added bldr image for ubuntu 20.04

“This in order for the near-RT RIC project to be able to use the updated Ubuntu release”

Issue-Id: RIC-676
Change-Id: I045b61554dde22e8c4bdccbfd08cc03b041e6c99
Signed-off-by: Juha Hyttinen <juha.hyttinen@nokia.com>
diff --git a/jjb/it-dev/it-dev-docker.yaml b/jjb/it-dev/it-dev-docker.yaml
index a2311d9..7cf1590 100644
--- a/jjb/it-dev/it-dev-docker.yaml
+++ b/jjb/it-dev/it-dev-docker.yaml
@@ -54,3 +54,7 @@
 - project:
     name: bldr-ubuntu18-c-go
     <<: *it_dev_docker_common
+
+- project:
+    name: bldr-ubuntu20-c-go
+    <<: *it_dev_docker_common