Adjust job launch blocking logic

Previously a job template would always block another job template launch
regardless of the details of the job template.   We now restrict that
blocking logic to only block in the case that the job template was
launched with the same inventory.   We keep the exclusion where if the
launch type is 'callback' and the limits differ then they won't be blocked

awx/main/tests/functional/conftest.py

@@ -28,6 +28,7 @@ from awx.main.models.credential import Credential
 from awx.main.models.jobs import JobTemplate
 from awx.main.models.inventory import (
     Group,
+    Inventory,
 )
 from awx.main.models.organization import (
     Organization,
@@ -175,6 +176,16 @@ def machine_credential():
 def inventory(organization):
     return organization.inventories.create(name="test-inv")
 
+@pytest.fixture
+def inventory_factory(organization):
+    def factory(name, org=organization):
+        try:
+            inv = Inventory.objects.get(name=name, organization=org)
+        except Inventory.DoesNotExist:
+            inv = Inventory.objects.create(name=name, organization=org)
+        return inv
+    return factory
+
 @pytest.fixture
 def label(organization):
     return organization.labels.create(name="test-label", description="test-label-desc")