Move to Spark 2; Scala 2.10 deprecation

[pomadchin]

Tests are passing, needs to be tested on a real cluster, fixes #1626

• scala 2.10 deprecated
• all libs update
• Travis CI
• Landsat EMR demo test
• remove logging usage from serializable code (private Spark 2.0 Logging overload) dep hell related to scala landsat util (Scala 2.10 deprecation azavea/scala-landsat-util#6)
• if we are going to support both Java 7 and Java 8, it is not possible to update typesafe config dep
• noticed a bug / feature trying to update geotools

val actual = GeometryToSimpleFeature(multiPolygon, None, emptyList)
val expected = GeometryToSimpleFeature(multiPolygon, None, emptyList)

actual.equals(expected) 
// throws com.vividsolutions.jts.geom.TopologyException: 
// side location conflict [ (0.0, 3.0, NaN) ]

• wanted to try beta 2.12-RC1 support, but we have a very strong blocker: https://issues.apache.org/jira/browse/SPARK-14220 it is possible to try to support scala 2.12 at least in some subprojects though.
• includes @fosskers PR More Joda serializers #1632

[pomadchin]

It is still unclear for me, why we still need to exclude kryo (otherwise hbase tests would fail):

"de.javakaffee" % "kryo-serializers" % "0.38" exclude("com.esotericsoftware.kryo", "kryo") exclude("com.esotericsoftware", "kryo"),
"com.esotericsoftware" % "kryo-shaded" % "3.0.3"

[pomadchin]

Should we deprecate java 7 as well?

[lossyrob]

@pomadchin re: java 7, I belive we decided yes, if there's changes that are required for that they can go in another PR.