PostgreSQL and MySQL fixes for ACE-5143: CLONE - CleanAlfPropTables deleting more than it should

- New test PropertyValueCleanupTest
 - Generates some data for the script to clean up
 - Concurrently generates attribute values while cleanup script is running
 - Checks that the script cleaned up the orphaned data
 - Checks all newly-generated attributes to ensure that they survived the script in tact
 - The second SQL statement modification can be reverted to produce the failure mode observed in ACE-5143


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/DEV/5.1.N/root@122471 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/test-java/org/alfresco/repo/domain/DomainTestSuite.java

@@ -27,6 +27,7 @@ import org.alfresco.repo.domain.mimetype.MimetypeDAOTest;
 import org.alfresco.repo.domain.node.NodeDAOTest;
 import org.alfresco.repo.domain.patch.AppliedPatchDAOTest;
 import org.alfresco.repo.domain.permissions.AclCrudDAOTest;
+import org.alfresco.repo.domain.propval.PropertyValueCleanupTest;
 import org.alfresco.repo.domain.propval.PropertyValueDAOTest;
 import org.alfresco.repo.domain.qname.QNameDAOTest;
 import org.alfresco.repo.domain.query.CannedQueryDAOTest;
@@ -52,6 +53,7 @@ import org.junit.runners.Suite;
     LocaleDAOTest.class,
     QNameDAOTest.class,
     PropertyValueDAOTest.class,
+    PropertyValueCleanupTest.class,
     AuditDAOTest.class,
     AppliedPatchDAOTest.class,
     AclCrudDAOTest.class,