update test expectations for notebook 7

nbextension is gone

tests/pipfile/py2-with-server-and-kernel-req/requirements3.txt

@@ -1,3 +1,3 @@
-# install this in the environment in which the notebook server
+# install this in the environment in which the notebook server is running
-# is running nbgitpuller does not work with Python 2
+# nbgitpuller does not work with Python 2
-nbgitpuller==0.6.1
+nbgitpuller

tests/venv/postBuild/postBuild

@@ -1,4 +1,4 @@
 #!/bin/bash
-jupyter nbextension enable --py --sys-prefix ipyleaflet
+jupyter server extension disable --sys-prefix jupyter_collaboration
 npm install --global configurable-http-proxy
 npm cache clean --force

tests/venv/postBuild/requirements.txt

@@ -1 +1 @@
-ipyleaflet
+jupyter-collaboration

tests/venv/postBuild/verify

@@ -1,4 +1,4 @@
 #!/bin/bash
 set -euo pipefail
-jupyter nbextension list | grep 'jupyter-leaflet' | grep enabled
+jupyter server extension list 2>&1 | grep 'jupyter_collaboration' | grep disabled
 which configurable-http-proxy