Changed node shape from circle to oval

castor/tape/doc/collaboration_diagrams/dismount_processes.dot

 digraph dismount_processes {
 rankdir=LR;
-node [shape = circle];
+node [shape = oval];
+edge [weight = 1];
 rtcpd     -> taped     [ label =  "1 release volume"                      ];
 taped     -> rlstape   [ label =  "2 fork and exec"                       ];
 rlstape   -> rlstape   [ label =  "3 check SCSI tape-alerts page\n\n "    ];

castor/tape/doc/collaboration_diagrams/mount_processes.dot

 digraph mount_processes {
 rankdir=LR;
-node [shape = circle];
+node [shape = oval];
+edge [weight = 1];
 gateway   -> vmgr      [ label =  "1 get volume"                          ];
 gateway   -> vdqm      [ label =  "2 get drive"                           ];
 vdqm      -> vdqm      [ label =  "3 drive up -> starting\n\n\n "         ];

castor/tape/doc/collaboration_diagrams/mounttape_rmcd_scsi.dot

 digraph mounttape_rmcd_scsi {
 rankdir=LR;
-node [shape = circle];
+node [shape = oval];
+edge [weight = 1];
 mounttape -> rmcd      [ label =  "1 mount volume"                        ];
 rmcd      -> rmcd      [ label =  "2 find cartridge"                      ];
 rmcd      -> rmcd      [ label =  "3 move medium"                         ];

castor/tape/doc/collaboration_diagrams/mounttape_ssi.dot

 digraph mounttape_ssi {
 rankdir=LR;
-node [shape = circle];
+node [shape = oval];
+edge [weight = 1];
 mounttape -> ssi       [ label =  "1 acs_mount"                           ];
 mounttape -> mounttape [ label =  "2 While drive does not see volume"     ];
 mounttape -> mounttape [ label =    "2.1 MTIOCGET\n\n\n\n\n\n\n\n "       ];

castor/tape/doc/collaboration_diagrams/rlstape_rmcd_scsi.dot

 digraph rlstape_rmcd_scsi {
 rankdir=LR;
-node [shape = circle];
+node [shape = oval];
+edge [weight = 1];
 rlstape -> rmcd [ label =  "1 unmount volume"                              ];
 rmcd    -> rmcd [ label =  "2 While library does not see drive is unloaded"];
 rmcd    -> rmcd [ label =    "2.1 Read drive element status"               ];

castor/tape/doc/collaboration_diagrams/rlstape_ssi.dot

 digraph rlstape_ssi {
 rankdir=LR;
-node [shape = circle];
+node [shape = oval];
+edge [weight = 1];
 rlstape -> ssi     [ label =  "1 acs_dismount"                        ];
 rlstape -> rlstape [ label =  "2 while not received RF_FINAL from ssi"];
 rlstape -> ssi     [ label =    "2.1 acs_response"                    ];