ceph-common: Don't check for ceph_stable_release for distro packages

When we consume the distribution packages, we don't have the choise on
which version to install, so we shouldn't require that variable to be
set. Distributions normally provide only one version of Ceph in the
official repositories so we get whatever they provide.

Signed-off-by: Markos Chandras <mchandras@suse.de>
(cherry picked from commit dd6ee72)

upgrade: skip luminous tasks for jewel minor update

These tasks are needed only when upgrading to luminous.
They are not needed in Jewel minor upgrade and by the way, they fail because
`ceph versions` command doesn't exist.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1535382

(cherry picked from commit c7ec12d)
Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>

osds: change default value for `dedicated_devices`

This is to keep backward compatibility with stable-2.2 and satisfy the
check "verify dedicated devices have been provided" in
`check_mandatory_vars.yml`. This check is looking for
`dedicated_devices` so we need to default it's value to
`raw_journal_devices` when `raw_multi_journal` is set to `True`.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1536098

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit 9306a17)

purge-container: use lsblk to resolv parent device

Using `lsblk` to resolv the parent device is better than just removing the last
char when passing it to the zap container.

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit 55298fa)
Signed-off-by: Sébastien Han <seb@redhat.com>

ci: test on ansible 2.4.2

Signed-off-by: Sébastien Han <seb@redhat.com>
(cherry picked from commit 7ba25b2)
Signed-off-by: Sébastien Han <seb@redhat.com>

containers: bump memory limit

A default value of 4GB for MDS is more appropriate and 3GB for OSD also.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1531607
Signed-off-by: Sébastien Han <seb@redhat.com>

containers: bump memory limit

A default value of 4GB for MDS is more appropriate and 3GB for OSD also.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1531607
Signed-off-by: Sébastien Han <seb@redhat.com>

containers: bump memory limit

A default value of 4GB for MDS is more appropriate and 3GB for OSD also.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1531607
Signed-off-by: Sébastien Han <seb@redhat.com>

purge-cluster: clean some code

Avoid using regexp to match device

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit c5b7b37)
Signed-off-by: Sébastien Han <seb@redhat.com>

Merge pull request ceph#2208 from ceph/2207-bkp

[skip ci] backport of 2207