In functions `qemuDomainObjInitJob`, `qemuDomainObjResetJob`,
`qemuDomainObjResetAgentJob`, `qemuDomainObjResetAsyncJob`,
`qemuDomainObjFreeJob`, `qemuDomainJobAllowed`,
`qemuDomainNestedJobAllowed` we avoid sending the complete
qemuDomainObjPrivatePtr as parameter and instead just send
qemuDomainJobObjPtr.

This is done in a effort to separating the qemu-job APIs into
a spearate file.
Signed-off-by: NPrathamesh Chavan <pc44800@gmail.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>