[SPARK-4701] Typo in sbt/sbt

Modified typo.

Author: Masayoshi TSUZUKI <tsudukim@oss.nttdata.co.jp>

Closes #3560 from tsudukim/feature/SPARK-4701 and squashes the following commits:

ed2a3f1 [Masayoshi TSUZUKI] Another whitespace position error.
1af3a35 [Masayoshi TSUZUKI] [SPARK-4701] Typo in sbt/sbt
[SPARK-4715][Core] Make sure tryToAcquire won't return a negative value

ShuffleMemoryManager.tryToAcquire may return a negative value. The unit test demonstrates this bug. It will output `0 did not equal -200 granted is negative`.

Author: zsxwing <zsxwing@gmail.com>

Closes #3575 from zsxwing/SPARK-4715 and squashes the following commits:

a193ae6 [zsxwing] Make sure tryToAcquire won't return a negative value
[SPARK-4642] Add description about spark.yarn.queue to running-on-YARN document.

Added descriptions about these parameters.
- spark.yarn.queue

Modified description about the defalut value of this parameter.
- spark.yarn.submit.file.replication

Author: Masayoshi TSUZUKI <tsudukim@oss.nttdata.co.jp>

Closes #3500 from tsudukim/feature/SPARK-4642 and squashes the following commits:

ce99655 [Masayoshi TSUZUKI] better gramatically.
21cf624 [Masayoshi TSUZUKI] Removed intentionally undocumented properties.
88cac9b [Masayoshi TSUZUKI] [SPARK-4642] Documents about running-on-YARN needs update
[HOT FIX] [YARN] Check whether `/lib` exists before listing its files

This is caused by a975dc32799bb8a14f9e1c76defaaa7cfbaf8b53

Author: Andrew Or <andrew@databricks.com>

Closes #3589 from andrewor14/yarn-hot-fix and squashes the following commits:

a4fad5f [Andrew Or] Check whether lib directory exists before listing its files