Revert "Updates for uuid2"

This reverts commit 2e28f539c5f223f17cb8d33f4ed451338b25bbc4.
Also modifies id length of tables created after this commit
from 37 down to 32, and fixes annotations.

Conflicts:
	src/main/resources/db/changelog/changelog-create.xml
	src/main/resources/db/changelog/changelog-update.xml
Merge pull request #546 from candlepin/ckozak/revert_uuid

Revert "Updates for uuid2"