Update to Prism 2.x

[gabrielclima]

Fixes

Checklist

• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the [Contribution Guide] and my PR follows them.
• I updated my branch with the master branch.
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation about the functionality in the appropriate .md file
• I have added in line documentation to the code I modified

Short description of what this PR does:

• Update prism.sh script, Dockerfile and entrypoint.sh to use and up latest Prism service.
• Change tests to work with accord.

If you have questions, please send an email to Sendgrid, or file a Github Issue in this repository.

[SendGridDX]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ gabrielclima
❌ pytlesk4
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[childish-sambino]

Closing as prism integration has been moved to https://github.com/sendgrid/sendgrid-oai