Update after code review + rebase

[eleidan]

Update Rails routes as follows: team_members/:team_id -> teams/:id/members, team_vacations/:team_id -> teams/:id/vacations, requested_vacations/:user_id -> /users/:id/requested_vacations.

Update dynamic routes for the BB collections accordingly

Move and rename Rails method controller as follows: vacation_requests#requested -> users#requested_vacations.

Improve requested_accepted_inprogress scope

Improve SQL query for teams#vacations

Rebase from master branch

Update TimeTableByWeek#markVacation after rebase @alazarchuk , @andriiNyzhnik , @epmlys