[c-c create] unification of c-c create and its subcommands handling * create/db-create/db-init uniformly accept --automatic and --config-level options, properly passed along the way * --automatic option fixed so it doesn't need yes or no argument * closes ##1537265 on the way

[rql rewriter] to properly handle 'relation' rql expressions, rql rewriter must support multiple variables (eg S and O) at once to be given as varmap

[rql rewriter] drop unused argument