SPARK-1812: Fix @transient annotation errors

- convert to @transient val when unsure
- remove @transient annotation elsewhere

Signed-off-by: Anand Avati <avati@redhat.com>
SPARK-1812: move to akka-zeromq-2.11.0-M3 version 2.2.0

.. until akka-zeromq-2.11 gets published

Signed-off-by: Anand Avati <avati@redhat.com>
SPARK-1812: core - [FIXWARNING] replace scala.concurrent.{future,promise} with {Future,Promise}

Signed-off-by: Anand Avati <avati@redhat.com>
SPARK-1812: core - [FIXWARNING] try { } without catch { } warning

Signed-off-by: Anand Avati <avati@redhat.com>
SPARK-1812: temporarily disable

- remove spark-repl from assembly dependency
- temporarily disable external/kafka module (dependency unavailable)
- examples module
  - kafka_2.11 (transitive)
  - algebird_2.11 (com.twitter)

Signed-off-by: Anand Avati <avati@redhat.com>
SPARK-1812: update all artifactId to spark-${module}_2.11

Signed-off-by: Anand Avati <avati@redhat.com>