Yum module using nested variables

Hi everyone,

I have this task:

that won't work as you think, its appending a commas separated string
as an item of the other list, not merging lists, you want something
like this:

common_rpm_deps: "{{[ gcc, git, python-devel, python-tox,
python-testrepository, python-mock, python-pip python-testscenarios,
python-oslo]|union(hostvars[inventory_hostname][tester.name]['rpm_deps'])}}"

you might need to quote the package names