fix: print schedule text along with error message (#679)

* fix: print schedule text along with error message

* update test

lib/workers/branch/schedule.js

@@ -29,11 +29,11 @@ function hasValidSchedule(schedule) {
       return true;
     }
     if (parsedSchedule.schedules.some(s => s.m)) {
-      message = 'Schedules should not specify minutes';
+      message = `Schedule "${scheduleText}" should not specify minutes`;
       return true;
     }
     if (!parsedSchedule.schedules.some(s => s.d || s.t_a || s.t_b)) {
-      message = 'Schedule has no days of week or time of day';
+      message = `Schedule "${scheduleText}" has no days of week or time of day`;
       return true;
     }
     // It must be OK

test/config/__snapshots__/validation.spec.js.snap

@@ -8,7 +8,7 @@ Array [
   },
   Object {
     "depName": "Configuration Error",
-    "message": "Invalid schedule: \`Schedules should not specify minutes\`",
+    "message": "Invalid schedule: \`Schedule \\"every 15 mins every weekday\\" should not specify minutes\`",
   },
   Object {
     "depName": "Configuration Error",