1) Although current PCD tool's code support use packageName, packageGuid, version, arch to identify a module, but these value can not be got from FPD file, so use null for transition phase.
2) Add transition code to check <TokenSpaceGuid>, In future, the checking work should be done by schema checking tools when change occur of <TokenSpaceGuid> from[0..1] to [1] in schema.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@508 6f19259b-4bc3-4df7-8a09-765794883524
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