Add a system to change the start of the TCC numbering for CVC3.

The CVC3 generator originally insured that the TCC numbering was always unqie
for a table.  Re-add this functionality.  Specifically, when building the walker,
add a parameter to its constructor to set its starting TCC number.

git-svn-id: https://groke.mcmaster.ca/svn/grad/colin/branches/TableTool_javization@10712 57e6efec-57d4-0310-aeb1-a6c144bb1a8b