This introduces some new utility functions for generating common expected queries: * `reviewboard.accounts.testing.queries`: * `get_user_by_pk_equeries()` * `get_user_local_site_profile_equeries()` * `get_user_profile_equeries()` * `reviewboard.site.testing.queries`: * `get_local_site_by_name_equeries()` * `get_local_site_is_accessible_by_equeries()` * `get_local_site_is_mutable_by_equeries()` * `get_check_local_site_access_equeries()` * `reviewboard.testing.queries.http`: * `get_http_request_user_equeries()` * `get_http_request_start_equeries()` Most of these perform simple checks used at the start of most view handling. They'll be used for some in-progress test updates, and will likely be expanded as the equery library grows. It also introduces a common type for functions that return Q-expressions: `reviewboard.testing.queries.base.ExpectedQResult`. This helps ensure consistent results and typing for these sorts of functions.