Set inv src custom virtualenv directly on model

awx/main/migrations/0066_v350_inventorysource_custom_virtualenv.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.16 on 2019-03-28 17:56
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0065_v350_index_job_status'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='inventorysource',
+            name='custom_virtualenv',
+            field=models.CharField(blank=True, default=None, help_text='Local absolute file path containing a custom Python virtualenv to use', max_length=100, null=True),
+        ),
+    ]