[SPARK-1812] upgrade dependency to scala-logging 2.1.2

Scala 2.11 packages not available for the current version (1.0.1)

Signed-off-by: Anand Avati <avati@redhat.com>
scalalogging-slf4j-1.0.1 seems to be split into scala-logging-{slf4j,api} for 2.1.2. Previously scalalogging was missing in sql/core pom.xml (usually not a problem unless you do mvn compile within the module)