Create SparkSession in SparkFunSuite

[fnothaft]

Resolves #120. Necessitates bumping project to Spark 2. (I bumped to Scala 2.11 by default as well). This is inline with ADAM downstream, so I figured it was OK!

[heuermh]

lgtm

[heuermh]

This fails to build for me locally

$ mvn clean install
...
[INFO] Compiling 4 source files to /Users/mheuer2/working/utils/utils-misc/target/2.11.8/test-classes at 1525194272851
[ERROR] /Users/mheuer2/working/utils/utils-misc/src/test/scala/org/bdgenomics/utils/misc/MathUtilsSuite.scala:25:
error: can't expand macros compiled by previous versions of Scala
[ERROR]     assert(MathUtils.fpEquals(0.0, 0.0))
[ERROR]                              ^
[ERROR] /Users/mheuer2/working/utils/utils-misc/src/test/scala/org/bdgenomics/utils/misc/MathUtilsSuite.scala:26:
error: can't expand macros compiled by previous versions of Scala
[ERROR]     assert(MathUtils.fpEquals(1e-6, 1e-7))
[ERROR]                              ^
...
[ERROR] 42 errors found
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] utils 0.2.14-SNAPSHOT .............................. SUCCESS [  2.389 s]
[INFO] utils-misc-spark2_2.11: Miscellaneous Spark helper code FAILURE [ 14.677 s]
[INFO] utils-minhash-spark2_2.11: MinHash-based Jaccard similarity estimator SKIPPED
[INFO] utils-metrics-spark2_2.11: tools for collecting metrics on top of RDDs SKIPPED
[INFO] utils-io-spark2_2.11: I/O utils .................... SKIPPED
[INFO] utils-statistics-spark2_2.11: Spark code for fitting statistical models SKIPPED
[INFO] utils-cli-spark2_2.11: utilities for building command line applications SKIPPED
[INFO] utils-serialization-spark2_2.11: tools for serializing data SKIPPED
[INFO] utils-intervalrdd-spark2_2.11: IntervalRDD based on interval tree 0.2.14-SNAPSHOT SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------

Some dependency missed going 2.10 → 2.11 perhaps?

[heuermh]

Created pull request fnothaft#1 that fixes the build issues.

[heuermh]

Closing in favor of #125