Major Description
When there are logs in the logs/ directory, the rat check from ./dev/check-license fails.
```
aash@aash-mbp ~/git/spark$ find logs -type f
logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out
logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out.1
logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out.2
logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out.3
logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out.4
logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out.5
logs/spark-aash-org.apache.spark.deploy.worker.Worker--aash-mbp.local.out
logs/spark-aash-org.apache.spark.deploy.worker.Worker--aash-mbp.local.out.1
logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out
logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out.1
logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out.2
logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out.3
logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out.4
logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out.5
logs/spark-aash-spark.deploy.master.Master-1-aash-mbp.local.out
logs/spark-aash-spark.deploy.master.Master-1-aash-mbp.local.out.1
logs/spark-aash-spark.deploy.master.Master-1-aash-mbp.local.out.2
logs/spark-aash-spark.deploy.worker.Worker-1-aash-mbp.local.out
logs/spark-aash-spark.deploy.worker.Worker-1-aash-mbp.local.out.1
logs/spark-aash-spark.deploy.worker.Worker-1-aash-mbp.local.out.2
aash@aash-mbp ~/git/spark$ ./dev/check-license
Could not find Apache license headers in the following files:
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out.1
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out.2
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out.3
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out.4
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.master.Master-1-aash-mbp.local.out.5
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.worker.Worker--aash-mbp.local.out
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.worker.Worker--aash-mbp.local.out.1
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out.1
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out.2
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out.3
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out.4
!????? /Users/aash/git/spark/logs/spark-aash-org.apache.spark.deploy.worker.Worker-1-aash-mbp.local.out.5
!????? /Users/aash/git/spark/logs/spark-aash-spark.deploy.master.Master-1-aash-mbp.local.out
!????? /Users/aash/git/spark/logs/spark-aash-spark.deploy.master.Master-1-aash-mbp.local.out.1
!????? /Users/aash/git/spark/logs/spark-aash-spark.deploy.master.Master-1-aash-mbp.local.out.2
!????? /Users/aash/git/spark/logs/spark-aash-spark.deploy.worker.Worker-1-aash-mbp.local.out
!????? /Users/aash/git/spark/logs/spark-aash-spark.deploy.worker.Worker-1-aash-mbp.local.out.1
!????? /Users/aash/git/spark/logs/spark-aash-spark.deploy.worker.Worker-1-aash-mbp.local.out.2
aash@aash-mbp ~/git/spark$
```