We had the powerpack backend for ClearCase listed in the server_tool_ids

field, but not server_tool_names. This meant that when running against an

older version of Review Board that does not allow filtering by ID,

RBTools would fail to find configured repositories. This change adds

that to the names field as well so we'll find and match all

ClearCase-based repositories, both with the old open-source and newer

powerpack backends.

Ran a test with an older Review Board server and saw that we were

passing the correct argument to ?tool= in the API call.