Sbt Lighter Versions Save

• Add BootstrapAction Support
• Update default EMR version

• Upgrade AWS Java API and sbt-assembly
• Upgrade to emr-5.14.0 with Spark 2.3.0
• Change default instance type to m4.large with 32GB EBS.
• Add EBS settings (sparkMasterEbsSize, sparkCoreEbsSize) for Master and Core nodes.

• Change name to sbt-lighter.
• Set visibleToAllUsers to true by default.
• Change sparkSubmitJob to sparkSubmit.
• Use EMR cluster id instead of cluster name to identify the cluster, allow multiple clusters with the same name to exist.
• Separate Master and Core instance type / bid price settings.
• Add SBT scripted test with ScalaMock.

Add the default value of sparkAwsRegion back but set it as "changeme". This prevent the error when using SBT Configs.

Refined several setting types and provided some shortcuts

• Changed the types of sparkSecurityGroupIds and sparkEmrConfigs from Option[T] to [T].
• Changed sparkInstanceBidPrice to Option[Double].
• Changed sparkEc2KeyName to sparkInstanceKeyName.
• Added sparkEmrApplications and sparkS3LogUri.
• Removed default value of sparkAwsRegion and sparkS3JarFolder.
• Upgraded default EMR release to 5.11.0.

Let user modify the Spark configs for each job using

sparkSubmitConfs := Map("spark.executor.memory" -> "10G", "spark.executor.instances" -> "2")

Upgraded to SBT 1.0