Minor bug in activiti.oracle.create.engine.sql

[grchld]

It seems the last statement in activiti.oracle.create.engine.sql has a misprint:

– see http://stackoverflow.com/questions/675398/how-can-i-constrain-multiple-columns-to-prevent-duplicates...
create unique index ACT_UNIQ_RU_BUS_KEY on ACT_RU_EXECUTION
   (case when BUSINESS_KEY_ is null then null else PROC_DEF_ID_ end,
    case when BUSINESS_KEY_ is null then null else BUSINESS_KEY_ end);
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the second BUSINESS_KEY_ should be replaced with PROC_DEF_ID_

[jbarrez]

The sql looks indeed funny, but I believe it does what it must do: the two parameters both depend on the business key