Add workflow node identifier

Generate new modules WFJT and WFJT node
Touch up generated syntax, test new modules

Add utility method in awxkit

Fix some issues with non-name identifier in
  AWX collection module_utils

Update workflow docs for workflow node identifier

Test and fix WFJT modules survey_spec
Plug in survey spec for the new module
Handle survey spec idempotency and test

add associations for node connections
Handle node credential prompts as well

Add indexes for new identifier field

Test with unicode dragon in name

awx/main/models/workflow.py

@@ -4,6 +4,7 @@
 # Python
 import json
 import logging
+from uuid import uuid4
 from copy import copy
 from urllib.parse import urljoin
 
@@ -121,6 +122,7 @@ class WorkflowNodeBase(CreatedModifiedModel, LaunchTimeConfig):
                 create_kwargs[field_name] = kwargs[field_name]
             elif hasattr(self, field_name):
                 create_kwargs[field_name] = getattr(self, field_name)
+        create_kwargs['identifier'] = self.identifier
         new_node = WorkflowJobNode.objects.create(**create_kwargs)
         if self.pk:
             allowed_creds = self.credentials.all()
@@ -135,7 +137,7 @@ class WorkflowJobTemplateNode(WorkflowNodeBase):
     FIELDS_TO_PRESERVE_AT_COPY = [
         'unified_job_template', 'workflow_job_template', 'success_nodes', 'failure_nodes',
         'always_nodes', 'credentials', 'inventory', 'extra_data', 'survey_passwords',
-        'char_prompts', 'all_parents_must_converge'
+        'char_prompts', 'all_parents_must_converge', 'identifier'
     ]
     REENCRYPTION_BLACKLIST_AT_COPY = ['extra_data', 'survey_passwords']
 
@@ -144,6 +146,22 @@ class WorkflowJobTemplateNode(WorkflowNodeBase):
         related_name='workflow_job_template_nodes',
         on_delete=models.CASCADE,
     )
+    identifier = models.CharField(
+        max_length=512,
+        default=uuid4,
+        blank=False,
+        help_text=_(
+            'An identifier for this node that is unique within its workflow. '
+            'It is copied to workflow job nodes corresponding to this node.'),
+    )
+
+    class Meta:
+        app_label = 'main'
+        unique_together = (("identifier", "workflow_job_template"),)
+        indexes = [
+            models.Index(fields=["identifier", "workflow_job_template"]),
+            models.Index(fields=['identifier']),
+        ]
 
     def get_absolute_url(self, request=None):
         return reverse('api:workflow_job_template_node_detail', kwargs={'pk': self.pk}, request=request)
@@ -213,6 +231,18 @@ class WorkflowJobNode(WorkflowNodeBase):
                     "semantics will mark this True if the node is in a path that will "
                     "decidedly not be ran. A value of False means the node may not run."),
     )
+    identifier = models.CharField(
+        max_length=512,
+        blank=True,  # blank denotes pre-migration job nodes
+        help_text=_('An identifier coresponding to the workflow job template node that this node was created from.'),
+    )
+
+    class Meta:
+        app_label = 'main'
+        indexes = [
+            models.Index(fields=["identifier", "workflow_job"]),
+            models.Index(fields=['identifier']),
+        ]
 
     def get_absolute_url(self, request=None):
         return reverse('api:workflow_job_node_detail', kwargs={'pk': self.pk}, request=request)