introduce incrementAndFetchColumn() on CM_Db_Db
add test for incrementAndFetchColumn()
add table cm_requestCounter
use cm_requestCounter in CM_Request_Abstract
Merge branch 'master' of github.com:cargomedia/CM into issue-1345
Merge branch 'master' of github.com:cargomedia/CM into issue-1345
fetch correct column
adjust test to test ints
remove cache const
add migration and renamed table
add setup.php to insert counter in cm_requestClientCounter
Merge branch 'master' of github.com:cargomedia/CM into issue-1345
Check whether cm_requestClient still exists!
Merge pull request #1345 from mariansollmann/issue-1345

cm_requestClient could use a *counter* instead of storing each id