Support proper migration for ishukone scorp (which is skin for regular scorp now)

eos/db/migrations/upgrade7.py

@@ -0,0 +1,24 @@
+"""
+Migration 7
+
+- Converts Scorpion Ishukone Watch to Scorpion
+
+    Mosaic introduced proper skinning system, and Ishukone Scorp
+    was the only ship which was presented as stand-alone ship in
+    Pyfa.
+"""
+
+
+CONVERSIONS = {
+    640: (  # Scorpion
+        4005,  # Scorpion Ishukone Watch
+    )
+}
+
+def upgrade(saveddata_engine):
+
+    # Convert ships
+    for replacement_item, list in CONVERSIONS.iteritems():
+        for retired_item in list:
+            saveddata_engine.execute('UPDATE "fits" SET "shipID" = ? WHERE "shipID" = ?', (replacement_item, retired_item))
+