Use legacy resolver during binder build

[lresende]

Fixes #1455

Developer's Certificate of Origin 1.1

   By making a contribution to this project, I certify that:

   (a) The contribution was created in whole or in part by me and I
       have the right to submit it under the Apache License 2.0; or

   (b) The contribution is based upon previous work that, to the best
       of my knowledge, is covered under an appropriate open source
       license and I have the right under that license to submit that
       work with modifications, whether created in whole or in part
       by me, under the same open source license (unless I am
       permitted to submit under a different license), as indicated
       in the file; or

   (c) The contribution was provided directly to me by some other
       person who certified (a), (b) or (c) and I have not modified
       it.

   (d) I understand and agree that this project and the contribution
       are public and that a record of the contribution (including all
       personal information I submit with it, including my sign-off) is
       maintained indefinitely and may be redistributed consistent with
       this project or the open source license(s) involved.

[elyra-bot]

Thanks for making a pull request to Elyra!

To try out this branch on binder, follow this link:

[ptitzler]

The binder build completed but there appears to be a problem when JL comes up:

[lresende]

Current deployed :

jupyter core     : 4.7.1
jupyter-notebook : 6.2.0
qtconsole        : not installed
ipython          : 7.20.0
ipykernel        : 5.5.0
jupyter client   : 6.1.11
jupyter lab      : 3.0.11
nbconvert        : 5.6.1
ipywidgets       : 7.6.3
nbformat         : 5.1.2
traitlets        : 5.0.5

    - Validating...
      jupyter_lsp 1.1.4 OK
    - Validating...
      jupyter_resource_usage  OK
    - Validating...
      jupyterlab 3.0.11 OK
    - Validating...
      nbdime 3.0.0.b1 OK
    - Validating...
      nteract_on_jupyter 2.1.3 OK
    - Validating...
      jupyter_offlinenotebook  OK
config dir: /srv/conda/envs/notebook/etc/jupyter
    jupyter_lsp  enabled
    jupyter_resource_usage  enabled
    jupyterlab  enabled
    nbdime  enabled
    nteract_on_jupyter  enabled
    jupyter_offlinenotebook  enabled

Config dir: /home/jovyan/.jupyter

Config dir: /srv/conda/envs/notebook/etc/jupyter
    elyra enabled
    - Validating elyra...
      elyra 2.2.0.dev0 OK
    jupyter_lsp enabled
    - Validating jupyter_lsp...
      jupyter_lsp 1.1.4 OK
    jupyter_resource_usage enabled
    - Validating jupyter_resource_usage...
      jupyter_resource_usage  OK
    jupyterlab enabled
    - Validating jupyterlab...
      jupyterlab 3.0.11 OK
    jupyterlab_git enabled
    - Validating jupyterlab_git...
      jupyterlab_git 0.30.0b1 OK
    nbclassic enabled
    - Validating nbclassic...
      nbclassic  OK
    nbdime enabled
    - Validating nbdime...
      nbdime 3.0.0.b1 OK
    jupyter_offlinenotebook enabled
    - Validating jupyter_offlinenotebook...
      jupyter_offlinenotebook  OK

Config dir: /usr/local/etc/jupyter


JupyterLab v3.0.11
/srv/conda/envs/notebook/share/jupyter/labextensions
        jupyter-offlinenotebook v0.2.1 enabled OK
        @jupyter-widgets/jupyterlab-manager v3.0.0 enabled OK (python, jupyterlab_widgets)
        @jupyter-server/resource-usage v0.5.0 enabled OK (python, jupyter-resource-usage)
        @krassowski/jupyterlab-lsp v3.4.1 enabled OK (python, jupyterlab_lsp)
        @jupyterlab/git v0.30.0-beta.1 enabled OK (python, jupyterlab-git)

Other labextensions (built into JupyterLab)
   app dir: /srv/conda/envs/notebook/share/jupyter/lab
        @elyra/code-snippet-extension v2.2.0-dev enabled OK
        @elyra/metadata-extension v2.2.0-dev enabled OK
        @elyra/pipeline-editor-extension v2.2.0-dev enabled OK
        @elyra/python-editor-extension v2.2.0-dev enabled OK
        @elyra/theme-extension v2.2.0-dev enabled OK
        nbdime-jupyterlab v2.1.0-beta.1 enabled OK


   linked packages:
        @elyra/metadata-common: /home/jovyan/packages/metadata-common
        @elyra/services: /home/jovyan/packages/services
        @elyra/ui-components: /home/jovyan/packages/ui-components

Disabled extensions:
    @jupyterlab/launcher-extension (all plugins)

[akchinSTC]

LGTM

[lresende]

This fixes the build issue, and the extension registration issue is resolved in #1476

[kevin-bates]

LGTM - thanks for dealing with this.