Comment 4 for bug 1647667

io.murano.applications classes appeared in Newton release:
https://github.com/openstack/murano/tree/stable/newton/meta
But it was never used in Mitaka release:
https://github.com/openstack/murano/tree/stable/mitaka/meta
https://review.fuel-infra.org/gitweb?p=openstack/murano.git;a=tree;f=meta;h=06a26d9acfb0afbb04620d4f0af798e0d7cde626;hb=7da2faedc5d8d92f2b4b65853b90a9441656bdb5

The package you're referring to is however available in the plugin which we develop for our client. And it actually contains all required fixes along with archive with classes you mentioned:
https://review.fuel-infra.org/gitweb?p=openstack/murano.git;a=tree;f=meta;h=4365779347f1bab90c932637ef6580ae8caf493c;hb=00f7dadda6d0804c6ee73c71a0e522a00a48aee4

Branches are also custom:
9.0/plugin
9.0/release/*