Merge pull request #27 from bowers/master

Add error checking and status reporting to hadoop setup
Fixes for the automated installer

Automated installer now works with Fedora distributions (tested on FC20)

Added automated installers for the following Virtual Application types: nullworkload,
netperf,coremark,ddgen,filebench,hadoop,mongo_ycsb,cassandra_ycsb,open_daytrader

Split DayTrader VApp in two separated sub-types: ibm_daytrader and open_daytrader.
A similar division was done for tradelite (ibmdb2_tradelite and ibmderby_tradelite)
Important bugfix: the Orchestrator Node has to be able to resolve
the hostname/ip used by the Log Store, otherwise messages from scripts
on the nodes will fail to get properly written into the remotescripts log.

Streamlined some functions on cb_common.sh, taking into account the
fact that in most modern distributions redis is now a fully-fledged
service.

Added a new workload: iperf
Merged Joe Taleric's pull request #29
Several bugfixes/tweaks in the following components: GUI, hadoop scripts, iperf scripts
Add configuration variable to control kmeans data generation; add retries to VCD destroy