Hawkular-Metrics has an error trying to connect to cassandra with a NullPointerException

Issue

• Cassandra starts up fine but hawkular-metrics fails to connect to cassandra:

Error: FATAL [org.hawkular.metrics.api.jaxrs.MetricsServiceLifecycle] (metricsservice-lifecycle-thread) HAWKMETRICS200006: An error occurred trying to connect to the Cassandra cluster: java.lang.RuntimeException: java.lang.NullPointerException
    at org.hawkular.metrics.api.jaxrs.DistributedLock.lockAndThen(DistributedLock.java:111)
    at org.hawkular.metrics.api.jaxrs.DistributedLock.lockAndThen(DistributedLock.java:95)
    at org.hawkular.metrics.api.jaxrs.MetricsServiceLifecycle.initJobsService(MetricsServiceLifecycle.java:711)

• hawkular-metrics crashes after failing to connect to cassandra but cassandra looks fine.