Now you can join tables with composite foreign/primary keys using RQF. In the
join attribute just use an array of columns that need to be used in the join

* Create routes /enrollment/gender and /enrollment/ethnic_group
* Add gender and ethnic_group to enrollment params in RQF

Route /api/v1/simulation/time exists and works with parameter max_time

* Example route: `/api/v1/simulation/time?max_time=10`
* Return value: {"result": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]}

If no value is specified in max_time, an error is returned

reqQueryFields would duplicate inner joins if the same property appeared in
dims and filter.

Was bugging the response when enabled

Related: simcaq/SCRUM#210

Related: simcaq/SCRUM#210

This adds the option to have values accepted only by one parameter, instead of
globals, like it was then

It uses a object to set the url fields accepted and it's values, parse the
fields and build the query with the values automagically

SQL now is using new schema

SQL is now compatible with DB schema in simcaqdb3