Update HighAvailabilityCassandraCluster.java

Add numAvailabilityZones and initialSize as catalog options.
Update WideAreaCassandraCluster.java

Add initialSize as catalog options.
Added version-specific dependency for jclouds-enterprise (required by whirr)
Added explicit call to Entities.manage() for whirr entities (fixes entity display issue in web console)
Fixed typo in whirrhadoop example
Updated screenshots in whirr hadoop example
Added whirr-elasticsearch dependency to hadoop-and-whirr example pom and test dependency to whirr/base/pom
Updated whirr example to add whirr-elasticsearch jar to BROOKLYN_CLASSPATH and added note about including whirr-elasticsearch as a dependency
Updated example text to use same classname as provided class
Added call to super.connectSensors() in QpidBrokerImpl (its ommission meant the BROKER_URL sensor was never set)
Added message to the example message subscriber to clarify why it run, then quit
Fixed issue that mean example subscriber would quit after 101 messages, not 100
Fixed another reference to StandaloneBrokerExample vs StandaloneQpidBrokerExample
Fixed addition of elasticsearch dependency that had broken whirr/base/pom.xml
Merge pull request #992 from Nakomis/hadoop-and-whirr-example

Hadoop and whirr example
Merge pull request #993 from jdtoy/hacass-demo-catalog

Cassandra Demos - Catalog Config Parameters
Update following PR comments
Changed pubsub message text to be in line with new Subscribe output
Fixed indentation following PR comments
Replaced erroneous magic number with constant