TashiDefaults: comment scratchVg entry in TashiDefaults, this value can now be None with soft-config in the code. Fixes error message on installs with no scratch support.
TashiDefaults: comment scratchVg entry in TashiDefaults, this value can now be None with soft-config in the code. Fixes error message on installs with no scratch support.

git-svn-id: bf82309ee31681273af20a825c7064ea7c5af838@1354649 13f79535-47bb-0310-9956-ffa450edef68

stroucki/tashi,stroucki/tashi,stroucki/tashi