[SPARK-LLAP-27] Add Apache Spark 2.1 Patch (#29)
[SPARK-LLAP-27] Add Apache Spark 2.1 Patch (#29)

## What changes were proposed in this pull request?

SPARK-LLAP needs Apache Spark patch. This PR adds the patch file for Apache Spark `branch-2.1`.

## How was this patch tested?

**BUILD**
```bash
git clone https://github.com/apache/spark.git -b branch-2.1
cd spark
curl https://raw.githubusercontent.com/hortonworks-spark/spark-llap/SPARK-LLAP-27/patch/0001-SPARK-LLAP-RANGER-Integration.patch | git am
build/sbt -Pyarn -Phadoop-2.7 -Phive -Phive-thriftserver package
```

**RUN SPARK THRIFT SERVER**
```bash
# Configure your `hive-site.xml` and `spark-default.xml`.
# Also, run Spark Thrift Server as `hive`.
sbin/start-thriftserver.sh --conf spark.sql.hive.llap=true
```

**TEST**
```bash
cd src/test/python
./spark-ranger-test.py
......................
----------------------------------------------------------------------
Ran 22 tests in 2900.331s

OK
```

This closes #27 and #8 .
hortonworks-spark/spark-llap,hortonworks-spark/spark-llap,hortonworks-spark/spark-llap