Fix #1050: Add --no-migration-assistant opt to LE5 Installer

Signed-off-by: Diego Pasqualin <dpasqualin@c3sl.ufpr.br>

ubiquity-le/VERSAO

-2.0.26
+2.0.27

ubiquity-le/pacote/usr/bin/ubiquity

@@ -30,6 +30,11 @@ def main():
         newargv.append(sys.argv[i])
         i += 1
 
+    # Fix #1050
+    # Prevent errors related to the migration assistant plugin
+    if '--no-migration-assistant' not in newargv:
+        newargv.append('--no-migration-assistant')
+
     if os.getuid() == 0:
         # no privilege escalation required
         inner = ['/usr/lib/ubiquity/bin/ubiquity']