q-agent-cleanup escape character handling

/root/openrc should contain escaped characters for
certain symbols, but are stripped when sourcing
this file in shell scripts. p-agent-cleanup.py
should treat user credentials as escaped strings
and not literal escape characters.

Closes-Bug: #1275655

Change-Id: Ia9534ef93508813b2a8cdc7368cf6f121ea40fe7
Merge "q-agent-cleanup escape character handling"