ACE-3188 : Incorporate Activiti 5.16.4: New index added: act_hi_varinst.act_idx_hi_procvar_task_id

- Added update scripts for activiti 5.16.4.
   - Updated schema reference files.

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@88704 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

config/alfresco/dbscripts/create/org.hibernate.dialect.MySQLInnoDBDialect/Schema-Reference-ACT.xml

@@ -4,7 +4,7 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:schemaLocation="http://www.alfresco.org/repo/db-schema db-schema.xsd" 
     name="" dbprefix="act_" 
-    version="8004" 
+    version="8009" 
     tablecolumnorder="false">
   <validators>
     <validator class="org.alfresco.util.schemacomp.validator.NameValidator">
@@ -783,6 +783,11 @@
             <columnname>VAR_TYPE_</columnname>
           </columnnames>
         </index>
+        <index name="ACT_IDX_HI_PROCVAR_TASK_ID" unique="false">
+          <columnnames>
+            <columnname>TASK_ID_</columnname>
+          </columnnames>
+        </index>
       </indexes>
     </table>
     <table name="act_id_group">