some minor renaming and code movement around table locking to make it easier for me to follow the code

git-svn-id: http://h2database.googlecode.com/svn/trunk@5773 e6896862-9d19-0410-bfb3-e9fa5d50e656
don't lock the META table in verifyMetaLocked(), since we're just going to throw an exception if it wasn't locked already

git-svn-id: http://h2database.googlecode.com/svn/trunk@5774 e6896862-9d19-0410-bfb3-e9fa5d50e656
A concurrent linked list, to replace the array list of old roots (work in progress)

git-svn-id: http://h2database.googlecode.com/svn/trunk@5775 e6896862-9d19-0410-bfb3-e9fa5d50e656
A concurrent linked list, to replace the array list of old roots (work in progress)

git-svn-id: http://h2database.googlecode.com/svn/trunk@5776 e6896862-9d19-0410-bfb3-e9fa5d50e656
Formatting

git-svn-id: http://h2database.googlecode.com/svn/trunk@5777 e6896862-9d19-0410-bfb3-e9fa5d50e656
A concurrent linked list, to replace the array list of old roots (work in progress)

git-svn-id: http://h2database.googlecode.com/svn/trunk@5778 e6896862-9d19-0410-bfb3-e9fa5d50e656