Fix provider "flavors" check

We intend to disallow setting "flavors" in a provider, but the
word "flavors" was misspelled.

Change-Id: I22e58ae9cd10020e8cff5f09cfd32965d584df79

tests/fixtures/layouts/nodepool-provider-flavors.yaml

@@ -0,0 +1,14 @@
+- flavor:
+    name: large
+
+- section:
+    name: aws-base
+    abstract: true
+    connection: aws
+
+- provider:
+    name: aws-us-east-1-main
+    section: aws-us-east-1
+    flavors:
+      - name: large
+        instance-type: t3.large

tests/unit/test_configloader.py

@@ -1628,3 +1628,11 @@ class TestNodepoolConfig(LauncherBaseTestCase):
         self.waitUntilSettled()
         tenant = self.scheds.first.sched.abide.tenants.get('tenant-one')
         self.assertFalse('badprovider' in tenant.layout.providers)
+
+    @simple_layout('layouts/nodepool-provider-flavors.yaml',
+                   enable_nodepool=True)
+    def test_nodepool_provider_flavors(self):
+        layout = self.scheds.first.sched.abide.tenants.get('tenant-one').layout
+        self.assertEquals(1, len(layout.loading_errors))
+        self.assertIn('Flavor configuration not permitted in',
+                      layout.loading_errors[0].error)

zuul/configloader.py

@@ -514,7 +514,7 @@ class ProviderParser(object):
     def fromYaml(self, conf):
         self.schema(conf)
 
-        if 'flavor' in conf:
+        if 'flavors' in conf:
             raise Exception("Flavor configuration not permitted in Provider, "
                             "only Section")