installer: reverting Requires vds_bootstrap change
installer: reverting Requires vds_bootstrap change

Previous patch adds a requirement that the vds_bootstrap RPM will be of
version 4.9.6 or higher. That caused a problem since this version is not
released yet. Removing this change.

Change-Id: Iea145f892199992b347f06bdd729e792962f4b71

yapengsong/ovirt-engine,yapengsong/ovirt-engine,OpenUniversity/ovirt-engine,eayun/ovirt-engine,yapengsong/ovirt-engine,zerodengxinchao/ovirt-engine,derekhiggins/ovirt-engine,halober/ovirt-engine,derekhiggins/ovirt-engine,zerodengxinchao/ovirt-engine,walteryang47/ovirt-engine,OpenUniversity/ovirt-engine,OpenUniversity/ovirt-engine,zerodengxinchao/ovirt-engine,halober/ovirt-engine,yingyun001/ovirt-engine,walteryang47/ovirt-engine,eayun/ovirt-engine,OpenUniversity/ovirt-engine,zerodengxinchao/ovirt-engine,OpenUniversity/ovirt-engine,halober/ovirt-engine,yingyun001/ovirt-engine,yapengsong/ovirt-engine,walteryang47/ovirt-engine,derekhiggins/ovirt-engine,yingyun001/ovirt-engine,walteryang47/ovirt-engine,zerodengxinchao/ovirt-engine,walteryang47/ovirt-engine,yapengsong/ovirt-engine,eayun/ovirt-engine,eayun/ovirt-engine,eayun/ovirt-engine,derekhiggins/ovirt-engine,yingyun001/ovirt-engine,yingyun001/ovirt-engine,halober/ovirt-engine