Prevent Oracle full table scan on nx_update_read_acls

SELECT	/*+ gather_plan_statistics */ r.id	   FROM nuxeo.hierarchy_read_aclr
	   JOIN nuxeo.hierarchy h ON h.id = r.id	 
           JOIN nuxeo.hierarchy_read_acl rr ON rr.id = h.parentid
WHERE r.acl_id <> '-' AND rr.acl_id = '-'

Plan hash value: 4002556013

| Id  | Operation		      | Name			      | Starts | E-Rows | A-Rows |   A-Time   | Buffers | Reads  |  OMem |  1Mem | Used-Mem |
|   0 | SELECT STATEMENT	      | 			      |      1 |	|      0 |00:00:12.55 |   77143 |  70036 |	 |	 |	    |
|*  1 |  HASH JOIN		      | 			      |      1 |  18549 |      0 |00:00:12.55 |   77143 |  70036 |   894K|   894K|  352K (0)|
|*  2 |   HASH JOIN		      | 			      |      1 |  19538 |      1 |00:00:07.74 |   48782 |  41703 |   894K|   894K|  355K (0)|
|   3 |    TABLE ACCESS BY INDEX ROWID| HIERARCHY_READ_ACL	      |      1 |   9014 |      1 |00:00:00.01 |       5 |      0 |	 |	 |	    |
|*  4 |     INDEX RANGE SCAN	      | HIERARCHY_READ_ACL_ACL_ID_IDX |      1 |   9014 |      1 |00:00:00.01 |       4 |      0 |	 |	 |	    |
|   5 |    TABLE ACCESS FULL	      | HIERARCHY		      |      1 |   2746K|   2873K|00:00:14.37 |   48777 |  41703 |	 |	 |	    |
|*  6 |   TABLE ACCESS FULL	      | HIERARCHY_READ_ACL	      |      1 |   2607K|   2715K|00:00:21.74 |   28361 |  28333 |	 |	 |	    |