remove extra comma

    user@lab:~% mco lusers who

    The lusers application failed to run, use -v for full error details: compile error
    /usr/libexec/mcollective/mcollective/agent/lusers.ddl:37: syntax error, unexpected kEND
    /usr/libexec/mcollective/mcollective/agent/lusers.ddl:51: syntax error, unexpected $end, expecting kEND

it looks like there is an extra comma in this file.