Fixes #15372 - Merge the correct hash when adding new volumes

Use 'attr' passed into the method and not the attrs hash on the cr.

Fixes #15344 - recover from fingerprint error on validation

Fixes #15066 - operating systems and ovirt < 3.6

The operating systems endpoint was added in ovirt 3.6
https://bugzilla.redhat.com/show_bug.cgi?id=1050243. Older versions
were failing getting 404 when provisioning.

This patch adds a check for this case. We also cache the operating...

Fixes #15163 - use new oVirt CA cert endpoint

Fixes #15154 - Added more safety measures to libvirt

fixes #3910 - add cdrom drive support for vmware

Refs #3809 - Turning on some rubocop cops

fixes #14874 - do not run path replace during vmware clone

Fixes #10278 - don't replace . with - for oVirt VM anymore

The version that supports . in VM names (v3.1.0-18) has been around
for almost 4 years
now (https://github.com/oVirt/ovirt-engine/commit/540a75e0f7bc4b9ed879471d3d830d575c6d6060).

Time to move one and make the VM names in oVirt a bit nicer now.

Fixes #6959 - set operating system for RHEV/ovirt VMs

Backward compatible, but works best with https://github.com/abenari/rbovirt/pull/104