fix recurring billing test, bump version

bubble-server/src/main/resources/META-INF/bubble/bubble.properties

@@ -1 +1 @@
-bubble.version=Adventure 1.2.7
+bubble.version=Adventure 1.2.8

bubble-server/src/test/resources/models/tests/payment/recurring_billing.json

@@ -358,8 +358,8 @@
   },
 
   {
-    "before": "fast_forward_and_bill 7d",
-    "comment": "5th fast-forward: fast-forward another +7 days, bill is still unpaid, bubble is stopped",
+    "before": "fast_forward_and_bill 8d",
+    "comment": "5th fast-forward: fast-forward another +8 days, bill is still unpaid, bubble is stopped",
     "request": {
       "session": "userSession",
       "uri": "me/plans/{{accountPlan.uuid}}/bills"