Merge pull request #1482 from mozilla/v3.1.2

Create v3.1.2 release and update changelog

Merge pull request #1395 from mozilla/release_3.1.1

Add release notes for v3.1.1

Modify ES version in aws to 6.7

Release v3.1.0

Update changelog
Update links to launch MozDef in AWS

Merge pull request #1342 from mozilla/python_3_upgrade

Python 3 upgrade

Merge pull request #1355 from mozilla/mozdef_2_0_1

Update changelog for v2.0.1

Merge pull request #1337 from mozilla/update_mozdef_es6version

Update mozdef version for v2.0.0

Merge pull request #1336 from mozilla/update_changelog_1-40

Update to mozdef v1.40.0

Merge pull request #1298 from mozilla/create_v1-39-0

Update changelog for 1.39.0

Merge pull request #1214 from gene1wood/change-cicd-sequence

Change CI/CD sequence for v1.38.5