Fix: libcrmservice: Revert single quotes to double quotes in metadata

078e007c changed a few double quotes to single quotes in the fake
metadata for systemd and upstart agents. This causes a pattern match to
fail in cts-lab.

A better fix is to create and dump real XML instead of substituting into
a string. This gets the job done for now.

Signed-off-by: Reid Wahl <nrwahl@protonmail.com>