Add license validation to the config validation check

Should prevent a customer from accidentally saving a config that violates their license

Fixes https://jira.coreos.com/browse/QS-97

util/config/validators/test/test_validate_license.py

@@ -0,0 +1,48 @@
+import pytest
+
+from mock import patch
+
+from util.config.validators import ConfigValidationException
+from util.config.validators.validate_license import LicenseValidator
+from util.morecollections import AttrDict
+from util.license import License, QUAY_DEPLOYMENTS_ENTITLEMENT, QUAY_ENTITLEMENT
+
+from test.fixtures import *
+
+@pytest.mark.parametrize('deployments, allowed_deployments', [
+  (1, 1),
+  (3, 3),
+  (3, 2),
+  (3, 1),
+])
+def test_too_many_storage_engines(deployments, allowed_deployments, app):
+  def get_license():
+    decoded = {
+      'expirationDate': '2157-12-1',
+      'subscriptions': {
+        'someSubscription': {
+          'serviceEnd': '2157-12-1',
+          'durationPeriod': 'yearly',
+          'entitlements': {
+            QUAY_ENTITLEMENT: 1,
+            QUAY_DEPLOYMENTS_ENTITLEMENT: allowed_deployments,
+          },
+        },
+      },
+    }
+    return License(decoded)
+
+  storage_configs = [(str(i), {}) for i in range(0, deployments)]
+
+  with patch('app.config_provider.get_license', get_license):
+    validator = LicenseValidator()
+
+    if allowed_deployments < deployments:
+      with pytest.raises(ConfigValidationException):
+        validator.validate({
+          'DISTRIBUTED_STORAGE_CONFIG': storage_configs,
+        }, None, None)
+    else:
+      validator.validate({
+        'DISTRIBUTED_STORAGE_CONFIG': storage_configs,
+      }, None, None)