docker: use Ubuntu:devel instead of rolling

rolling is actually the latest release (which we have in separate image).
See for more info: https://hub.docker.com/_/ubuntu

Author: lukaszstolarczuk

.github/workflows/other_OSes.yml

@@ -37,8 +37,8 @@ jobs:
                  "OS=opensuse-tumbleweed OS_VER=latest",
                  "OS=ubuntu OS_VER=18.04",
                  "OS=ubuntu OS_VER=20.10",
-                 "OS=ubuntu OS_VER=rolling PUSH_IMAGE=0",
-                 "TYPE=package OS=ubuntu OS_VER=rolling"]
+                 "OS=ubuntu OS_VER=devel PUSH_IMAGE=0",
+                 "TYPE=package OS=ubuntu OS_VER=devel"]
     steps:
       - name: Clone the git repo
         uses: actions/checkout@v2

…/docker/images/Dockerfile.ubuntu-rolling …ls/docker/images/Dockerfile.ubuntu-develutils/docker/images/Dockerfile.ubuntu-rolling renamed to utils/docker/images/Dockerfile.ubuntu-devel utils/docker/images/Dockerfile.ubuntu-rolling renamed to utils/docker/images/Dockerfile.ubuntu-devel

@@ -7,12 +7,12 @@
 #
 
 # Pull base image
-FROM registry.hub.docker.com/library/ubuntu:rolling
+FROM registry.hub.docker.com/library/ubuntu:devel
 MAINTAINER igor.chorazewicz@intel.com
 
 # Set required environment variables
 ENV OS ubuntu
-ENV OS_VER rolling
+ENV OS_VER devel
 ENV PACKAGE_MANAGER deb
 ENV NOTTY 1