Complete build now works

- Marks build as complete
- Deletes temporary BuildItem objects
- Preselects the part's default_location if there is one
- Creates a new stockitem in the selected location

InvenTree/build/migrations/0008_auto_20190501_2344.py

@@ -0,0 +1,25 @@
+# Generated by Django 2.2 on 2019-05-01 13:44
+
+import django.core.validators
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('build', '0007_auto_20190429_2255'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='build',
+            name='status',
+            field=models.PositiveIntegerField(choices=[(10, 'Pending'), (30, 'Cancelled'), (40, 'Complete')], default=10, validators=[django.core.validators.MinValueValidator(0)]),
+        ),
+        migrations.AlterField(
+            model_name='builditem',
+            name='build',
+            field=models.ForeignKey(help_text='Build to allocate parts', on_delete=django.db.models.deletion.CASCADE, related_name='allocated_stock', to='build.Build'),
+        ),
+    ]