r10511: add tests for db-reader and db-writer
r10511: add tests for db-reader and db-writer

sshirokov/CLSQL,ryszard/clsql,sshirokov/CLSQL,ryszard/clsql,ryszard/clsql,intronic/clsql,intronic/clsql,ryszard/clsql,intronic/clsql,sshirokov/CLSQL,intronic/clsql,sshirokov/CLSQL