Use logilab/cubicweb as default registry

Keep mirroring on hub.extranet.logilab.fr/cubicweb/cubicweb

Jenkinsfile

@@ -4,17 +4,17 @@ pipeline {
     stage('build') {
       steps {
         sh "python3 build.py --checkrebuild"
-        sh "python3 build.py --registry logilab/cubicweb"
+        sh "python3 build.py --registry hub.extranet.logilab.fr/cubicweb/cubicweb"
       }
     }
     stage('push hub.extranet.logilab.fr') {
       steps {
-        sh "python3 build.py --push"
+        sh "python3 build.py --push --registry hub.extranet.logilab.fr/cubicweb/cubicweb"
       }
     }
     stage('push logilab/cubicweb') {
       steps {
-        sh "python3 build.py --registry logilab/cubicweb --push"
+        sh "python3 build.py --push"
       }
     }
   }

README.rst

@@ -90,15 +90,15 @@ context and install your cube in develop mode and create an instance of your cub
 
 For example, given you're in the source tree of `cubicweb-blog`_, a Dockerfile would be as simple as::
 
-   FROM hub.extranet.logilab.fr/cubicweb/cubicweb:onbuild
+   FROM logilab/cubicweb:onbuild
 
 You can even build an image without actually writing any Dockerfile::
 
-   echo "FROM hub.extranet.logilab.fr/cubicweb/cubicweb:onbuild" | docker build -f - -t cubicweb-blog .
+   echo "FROM logilab/cubicweb:onbuild" | docker build -f - -t cubicweb-blog .
 
 In case you don't want a cubicweb version pre-installed and let your own dependencies control what version to install::
 
-   FROM hub.extranet.logilab.fr/cubicweb/cubicweb:py37-onbuild
+   FROM logilab/cubicweb:py37-onbuild
 
 .. _cubicweb-blog: https://hg.logilab.org/master/cubes/blog
 
@@ -116,7 +116,7 @@ In this case you have to:
 
 For example, given you're in the source tree of `cubicweb-blog`_::
 
-   FROM hub.extranet.logilab.fr/cubicweb/cubicweb:3.26
+   FROM logilab/cubicweb:3.26
    USER root
    COPY . /src
    RUN pip install -e /src
@@ -127,7 +127,7 @@ For example, given you're in the source tree of `cubicweb-blog`_::
 In case of out-of-source tree or not installing from /src directory, you will
 also have to set the ``CUBE`` environment variable::
 
-   FROM hub.extranet.logilab.fr/cubicweb/cubicweb:3.26
+   FROM logilab/cubicweb:3.26
    USER root
    RUN pip install cubicweb-blog
    USER cubicweb

build.py

@@ -7,7 +7,7 @@ import logging
 
 
 LOG = logging.getLogger(__name__)
-REGISTRY = 'hub.extranet.logilab.fr/cubicweb/cubicweb'
+REGISTRY = 'logilab/cubicweb'
 CWREPO = 'https://hg.logilab.org/master/cubicweb'
 MATRIX = [
     (['py27'], ['stretch', 'buster'], [None, '3.25', '3.26'],