VertexValueFactory
GIRAPH-582: Create a generic option for determining the number of
supersteps that a job runs for (aching)
GIRAPH-579
GIRAPH-510: Remove HBase Cruft
Merge remote-tracking branch 'origin/trunk' into hive-perf

Conflicts:
	giraph-core/src/main/java/org/apache/giraph/conf/GiraphConfiguration.java