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)