please add new DWH dependencies to CentOS slaves

[Sandro Bonazzola]

http://jenkins.ovirt.org/job/ovirt-dwh_create_rpms/141/

error: Failed build dependencies:
	commons-collections is needed by ovirt-engine-dwh-3.4.0-0.2.master.20140206144210.git6dac3ce.el6.noarch
	dom4j-eap6 is needed by ovirt-engine-dwh-3.4.0-0.2.master.20140206144210.git6dac3ce.el6.noarch
	ant is needed by ovirt-engine-dwh-3.4.0-0.2.master.20140206144210.git6dac3ce.el6.noarch

Thanks,

-- 
Sandro Bonazzola
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