Resource types should allow dynamic changes

[Nicolas Vila]

After you declare a resource type you can no longer modify it. If a resource type needs to be altered, one has to delete all resources associated to that type, delete it, create it again and let all resources to be created again (thus losing all data).

[Julien Danjou (jdanjou)]

Yeah I know this is on sileht's TODO list.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/368381

[OpenStack Infra (hudson-openstack)]

Change abandoned by gordon chung (<email address hidden>) on branch: master
Review: https://review.openstack.org/368381

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/363737
Committed: https://git.openstack.org/cgit/openstack/gnocchi/commit/?id=6163dfbde885e9ff71e0edc15b48f56ba71c1667
Submitter: Jenkins
Branch: master

commit 6163dfbde885e9ff71e0edc15b48f56ba71c1667
Author: Mehdi Abaakouk <email address hidden>
Date: Mon Apr 4 09:08:05 2016 +0200

    Allow to update resource-type (add attributes)

    This change allows to patch a resource type.

    The patch payload format is the RFC6902.

    For now, only operation add on /attributes path is allowed.

    Partial-Bug: #1615077

    Change-Id: Ia88396dbe771f916f9e72d7072caa03d30a8e693

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/363770
Committed: https://git.openstack.org/cgit/openstack/gnocchi/commit/?id=593fd452686e69503dcf68a68bd88d554667a226
Submitter: Jenkins
Branch: master

commit 593fd452686e69503dcf68a68bd88d554667a226
Author: Mehdi Abaakouk <email address hidden>
Date: Wed Aug 31 17:25:10 2016 +0200

    Allow to update resource-type (delete attributes)

    This change extends the resource type patch to
    allow to delete attributes.

    Partial-Bug: #1615077

    Change-Id: Iea24c075755a0e75f618ba8498515b2f8baa0a2c