New needle anaconda_blivet_vdb_selected-20190416

as previous needle only matched 96%
https://openqa.stg.fedoraproject.org/tests/520670#step/disk_custom_blivet_software_raid/36

Signed-off-by: Michel Normand <normand@linux.vnet.ibm.com>

needles/anaconda/partitioning/blivet/anaconda_blivet_vdb_selected-20190416.json

@@ -0,0 +1,15 @@
+{
+  "area": [
+    {
+      "type": "match",
+      "width": 51,
+      "height": 14,
+      "xpos": 353,
+      "ypos": 166
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "anaconda_blivet_vdb_selected"
+  ]
+}