Implements blueprint remove-old-flagfile
nova-manage can still be used to convert old flagfiles style files
to new .ini files:
$ ./bin/nova-manage config convert --help
Usage: nova-manage config convert <args> [options]
Options:
-h, --help show this help message and exit
--infile=<path> old-style flagfile to convert to config
--outfile=<path> path for output file. Writes configto stdout if not
specified.
Change-Id: Ib8fbbd858b1db7faef70d7d97955e5042bf378f2
Signed-off-by: Ghe Rivero <ghe@debian.org>