Remove limit on limit field.

This allows 'relaunch-on-failed' on an arbitrary number of failed hosts.

awx/api/views/__init__.py

@@ -3618,11 +3618,6 @@ class JobRelaunch(RetrieveAPIView):
                     'Cannot relaunch because previous job had 0 {status_value} hosts.'
                 ).format(status_value=retry_hosts)}, status=status.HTTP_400_BAD_REQUEST)
             copy_kwargs['limit'] = ','.join(retry_host_list)
-            limit_length = len(copy_kwargs['limit'])
-            if limit_length > 1024:
-                return Response({'limit': _(
-                    'Cannot relaunch because the limit length {limit_length} exceeds the max of {limit_max}.'
-                ).format(limit_length=limit_length, limit_max=1024)}, status=status.HTTP_400_BAD_REQUEST)
 
         new_job = obj.copy_unified_job(**copy_kwargs)
         result = new_job.signal_start(**serializer.validated_data['credential_passwords'])

awx/main/migrations/0058_v350_remove_limit_limit.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.16 on 2019-02-05 18:29
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0057_v350_remove_become_method_type'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='job',
+            name='limit',
+            field=models.TextField(blank=True, default=''),
+        ),
+        migrations.AlterField(
+            model_name='jobtemplate',
+            name='limit',
+            field=models.TextField(blank=True, default=''),
+        ),
+    ]

awx/main/models/jobs.py

@@ -93,8 +93,7 @@ class JobOptions(BaseModel):
         blank=True,
         default=0,
     )
-    limit = models.CharField(
-        max_length=1024,
+    limit = models.TextField(
         blank=True,
         default='',
     )