Merge pull request #5517 from lichesser/fix_set_depreciation_warning

Fixes #5513. set is built-in since 2.4 and deprecated since 2.6
Merge pull request #5520 from kormoc/fix_symetric_tyop

While looking into filters, I noticed that the documentation has a typo....
Merge pull request #5528 from dverhelst/devel

Adding support for detecting RHEV Hypervisor in ansible_virtualization_type
Merge pull request #5404 from sivel/rax-improvements

rax module: improvements
Fixes #5353 create etc/hostname file in debian if it does not exist
Fixes #5369 Do not pass --force-yes to aptitude