Update changelog for v1.2.2 release
Update changelog for v1.2.2 release

This is a release of v1.2.1, because the tag was created on a branch
rather than off master. The branch at that time did not have information
to release the package as a python 3 compatible distribution/package.

Connexions/cnx-easybake,Connexions/cnx-easybake,Connexions/cnx-easybake,Connexions/cnx-easybake