Make schedules accept gce/vmware/wa credentials.

awx/api/serializers.py

@@ -34,6 +34,7 @@ from rest_framework import serializers
 from polymorphic import PolymorphicModel
 
 # AWX
+from awx.main.constants import CLOUD_PROVIDERS
 from awx.main.models import *
 from awx.main.utils import update_scm_url, get_type_for_model, get_model_for_type
 
@@ -1389,7 +1390,7 @@ class ScheduleSerializer(BaseSerializer):
 
     def validate_unified_job_template(self, attrs, source):
         ujt = attrs[source]
-        if type(ujt) == InventorySource and ujt.source not in ('rax', 'ec2',):
+        if type(ujt) == InventorySource and ujt.source not in CLOUD_PROVIDERS:
             raise serializers.ValidationError('Inventory Source must be a cloud resource')
         return attrs