reindex claims when we detect change in the authorization

[romanchyla]

We do it when 'authorization' is removed from the profile; however it should be also done when authorization is granted. But I have to think about ways to throttle/prevent abuse - it could generate undesirated load if we always reindex everything

example where claim moved from 'user' to 'other'

orcid_pipeline=> select * from change_log where key like '%0000-0001-7917-3892%';
 id  |          created           |                      key                       |                    oldvalue                     |                    newvalue                     
-----+----------------------------+------------------------------------------------+-------------------------------------------------+-------------------------------------------------
 561 | 2017-09-20 01:26:59.773836 | 0000-0001-7917-3892:update:current_affiliation | "Department of Astronomy, University of Geneva" | null
 562 | 2017-09-20 01:26:59.774484 | 0000-0001-7917-3892:update:authorized          | true                                            | null
 811 | 2017-09-20 03:16:55.804883 | 0000-0001-7917-3892:update:authorized          | null                                            | true
 812 | 2017-09-20 03:16:55.805577 | 0000-0001-7917-3892:update:current_affiliation | null                                            | "Department of Astronomy, University of Geneva"