bll: LoginBaseCommand cleanup: avoid using object state

there is no reason to use object state as helper to avoid parameter
passing, per single flow.

in some control paths variables were not set.

Topic: AAA
Change-Id: I6bda9adef3630f8e2f7e4da90838261f20a52ea0
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>