If we use a glob too many files are attempted to be copied and we can
cause two issues:
* there can be a permission problem because an earlier call to
configure_rootwrap already wrote some files as root
* iniset calls on ceilometer.conf that already happened will be
clobbered
Change-Id: I960256cdd2c32bbbe4591282e8a56ee156541667
Closes-Bug: #1503338