drop constraint before modifying the path

[kwk]

Based on this discussion we first remove the unique name index on the iterations and areas table before we modify the data.

This should fix the migration issue that was visible here: https://github.com/openshiftio/saas-openshiftio/pull/1082

[alien-ike]

Ike Plugins (test-keeper)

Thank you @kwk for this contribution!

It appears that no tests have been added or updated in this PR.

Automated tests give us confidence in shipping reliable software. Please add some as part of this change.

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[codecov[bot]]

Codecov Report

Merging #2312 into master will increase coverage by 0.07%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2312      +/-   ##
==========================================
+ Coverage   70.04%   70.12%   +0.07%     
==========================================
  Files         174      174              
  Lines       16796    16796              
==========================================
+ Hits        11765    11778      +13     
+ Misses       3897     3887      -10     
+ Partials     1134     1131       -3

Impacted Files	Coverage Δ
workitem/workitem_repository.go	68.02% <0%> (+0.22%)	:arrow_up:
controller/workitem.go	78.83% <0%> (+0.56%)	:arrow_up:
remoteworkitem/scheduler.go	60.97% <0%> (+7.31%)	:arrow_up:
remoteworkitem/jira.go	100% <0%> (+25%)	:arrow_up:

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[tinakurian]

/ok-without-tests