ngr: Fix Gradle test runner by only _conditionally_ invoking gradle wrapper
#93
| Job | Run time |
|---|---|
| 1m 25s | |
| 2m 5s | |
| 3m 30s |
gradle wrapper
#93
| Job | Run time |
|---|---|
| 1m 25s | |
| 2m 5s | |
| 3m 30s |