Fixed CORE-4173: Setting generator value twice in single transaction will set it to zero.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58479 65644016-39b1-43b1-bf79-96bc8fe82c15
Fixed CORE-4176: Monitoring tables return incomplete information in SC/CS configurations.

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@58480 65644016-39b1-43b1-bf79-96bc8fe82c15