This ensures password containing a $ symbol can be read by
oslo_config. oslo_config supports variable substitution [1] and to
avoid substitution is need to escape $ with $$.
[1]: https://docs.openstack.org/oslo.config/latest/configuration/format.html#substitution
Test Plan:
- PASS: bootstrap a system controller with keystone admin password
containing $, dc services should start
Closes-Bug: 2089783
Change-Id: Icdbfae04b663bb9373116ff4967d4d78f57625c6
Signed-off-by: Wallysson Silva <wallysson.silva@windriver.com>
74f90fc674