clear the blocked message "non-pristine devices detected" when there is no non-pristine device anymore

[dongdong tao]

Currently, in the update_status hook
we can see it is trying to update the unit status and set the status to "Ready" if everything is real ready. however, it will fail if the previous status message is "Non-pristine devices detected .." even if there is no non-pristine device anymore.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/628423

[Xav Paice (xavpaice)]

Because of https://bugs.launchpad.net/charm-ceph-osd/+bug/1814995, I am also unable to run the add-disk action after running zap-disk, so this becomes a blocker for deploying ceph-osd once disks have been cleaned.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/628423
Committed: https://git.openstack.org/cgit/openstack/charm-ceph-osd/commit/?id=03247be7193e1fdc53a87bb50b1e732b34e0ad21
Submitter: Zuul
Branch: master

commit 03247be7193e1fdc53a87bb50b1e732b34e0ad21
Author: dongdong tao <email address hidden>
Date: Fri Jan 4 20:25:15 2019 +0800

    Clear the non-pristine blocked status

    We need to clear the blocked status "non-pristine device detected ..."
    when there is no non-pristine device anymore

    Change-Id: I2f31eb9c08be186c08554122c2a160bbcbf2c389
    Signed-off-by: dongdong tao <email address hidden>
    Closes-Bug: #1810508