4568: Remove double-quoted LSB_DESCRIPTION

The output from lsb_release -ds already has quotes, so we
just need to add it without additional quoting to the condor config.
4568: Handle quotes from lsb_release more portably

The Debian re-implementation of lsb_release doesn't display quotes
for the -ds option, while the FSG (included in Red Hat) version
does.  Just strip out all quotes and add our own.