Cleanup references to oscm@edx.org and other misc. remaining edx references

[e0d]

There are references to oscm@edx.org sprinkled throughout the org, we should update them to oscm@openedx.org

https://github.com/search?q=org%3Aopenedx+oscm%40edx.orgoscm@edx.org&tyoscm@edx.orgpe=code

Also there are a few items leftover from #42 :

easier:

• oscm@edx.org -> oscm@openedx.org
• uses: edx/.github string should, in most cases (but not all) be uses: openedx/.github
• another: http://code.edx.org/individual-contributor-agreement.pdf -> https://openedx.org/cla
• any instances of openedx/testeng-ci that I missed (that repo still in /edx/ org)

harder:

a switch/replace will fix 80% or so, but every PR will require manual checking to make sure they didn't hit things that stayed in the edx org. Potentially, these repo names can be obtained, and the strings parsed. Unclear which is more work.

• potentially (probably) there are other uses: edx: strings; should evaluate need for that switch
• github.com/repos/edx/ (for API strings) - again will be ok in most, but not all, places
• git clone git@github.com:edx/ -- already fixed paragon

[sarina]

What would you think about holding on this until we have maintainers, and then asking maintainers to update appropriately? I don't think, for example, the references on the configuration repo should go to us - what would we do with them?