pythonlib: allow java home bypass
pythonlib: allow java home bypass

to allow developers to use alternate JREs such as sun's.

Change-Id: I5f6c59fea689cff7ad4e8d33dad14e398a649ea6
Signed-off-by: Alon Bar-Lev <2e3ceb4d37adc6ae3ccc00d3646e0e0a036ace03@redhat.com>
eayun/ovirt-engine,OpenUniversity/ovirt-engine,OpenUniversity/ovirt-engine,zerodengxinchao/ovirt-engine,yapengsong/ovirt-engine,yapengsong/ovirt-engine,yingyun001/ovirt-engine,yingyun001/ovirt-engine,zerodengxinchao/ovirt-engine,walteryang47/ovirt-engine,OpenUniversity/ovirt-engine,walteryang47/ovirt-engine,zerodengxinchao/ovirt-engine,OpenUniversity/ovirt-engine,eayun/ovirt-engine,OpenUniversity/ovirt-engine,eayun/ovirt-engine,walteryang47/ovirt-engine,yingyun001/ovirt-engine,walteryang47/ovirt-engine,yapengsong/ovirt-engine,yingyun001/ovirt-engine,zerodengxinchao/ovirt-engine,eayun/ovirt-engine,walteryang47/ovirt-engine,yingyun001/ovirt-engine,yapengsong/ovirt-engine,zerodengxinchao/ovirt-engine,yapengsong/ovirt-engine,eayun/ovirt-engine