Delay for updating user-specific stats

[ShatalovYaroslav]

For the endpoint
/scheduler/stats/myaccount/
returns a stats related to the user's account. The stats returned from server are not updated for about 2 minutes.
The stats updating time should be decreased as it brings misleading for the portal stats displaying.

From the other endpoint:
/scheduler/stats/
It returns statistics about the scheduler (for all accounts). The stats are updated almost without any delay.