Stackrc is used to be referred via the working_dir path.
Fix the $HOME or /home/{{ undercloud_user }} paths, which only mathche
the default working dir of /home/stack.
Fix openssl commands to refer server-req.pem et al from the
working_dir instead of the current dir.
Additionally, when containerized undercloud, copy stackrc
created by the tripleoclient at the UC user $HOME to the working dir,
where it is expected by quickstart, if given a custom working dir.
Change-Id: Ic5834dbf66471802eb5a9319718d3ba02548236c
Signed-off-by: Bogdan Dobrelya <bdobreli@redhat.com>