Adds streams and processes for application design

Adds application level streams and process widgets to
model applications that run on networking devices or hosts.

* Changes Application to Process
* Adds StreamCreate and ProcessCreate messages
* Adds process id sequence to device
* Add serializers for streams and processes

awx/network_ui/migrations/0019_auto_20170822_1723.py

@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('network_ui', '0018_auto_20170821_1557'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='stream',
+            name='from_device',
+            field=models.ForeignKey(related_name='from_stream', to='network_ui.Device'),
+        ),
+        migrations.AlterField(
+            model_name='stream',
+            name='label',
+            field=models.CharField(max_length=200),
+        ),
+        migrations.AlterField(
+            model_name='stream',
+            name='to_device',
+            field=models.ForeignKey(related_name='to_stream', to='network_ui.Device'),
+        ),
+    ]

awx/network_ui/migrations/0020_device_process_id_seq.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('network_ui', '0019_auto_20170822_1723'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='device',
+            name='process_id_seq',
+            field=models.IntegerField(default=0),
+        ),
+    ]