CBLT-224:  put quotes around path variables now that someone added
           a directory with a space in the name

Change-Id: Idb3971ec017d88e12792c3e33eb86b88d593943a
Reviewed-on: http://review.couchbase.org/33716
Reviewed-by: Philip Labee <philip@couchbase.com>
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Tested-by: Eric Limare <eric.limare@couchbase.com>