Quote devstack_localrc arguments

If you have

 devstack_localrc:
   ARGUMENT: "argument with spaces"

The quotes get lost during YAML processing and the resulting file has

  ARGUMENT=argument with spaces

which is a shell error.

Quote all arguments to avoid this sort of thing.

Change-Id: Ia63a53d745dfea7262bcdb5d46425f431c3ccfe5
2 files changed