bash: fix bash completion with $PWD

This update for bash and aaa_base fixes several bash completion issues (i.e. the expansion of environment variables when pressing TAB, like $PWD).
- fix chkconfig for systemd (bnc#732934)

Fixed bugs
bnc#725657
bash completion $PWD wrong
bnc#752422
bash: path completion converts paths to absolute
bnc#738501
bash: completion of ~/subdir is wrong
bnc#732934
chkconfig service on|off does not work with systemd
Selected Binaries
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