test(resources): Bump router max CPU to 1200m (#796)

Note: This gets rid of the following error:

```
Caused by: java.lang.IllegalStateException: Insufficient configured threads: required=2 < max=2 for QueuedThreadPool
```

Author: NickLarsenNZ

tests/templates/kuttl/resources/30-install-druid.yaml.j2

@@ -113,4 +113,4 @@ spec:
                   requests:
                     cpu: 100m
                   limits:
-                    cpu: "1"
+                    cpu: 1200m