added endpoint to get most popular circles

1 job for circle-list in 8 minutes and 28 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #489241140
test

00:08:28

 
Name Stage Failure
failed
test Test
----------------------------------------------------------------------
Ran 2 tests in 0.005s

FAILED (failures=1)
Test directory: testdata/67e8e35c-730b-4445-a966-7112678738d5-test_default_config_json.py/
make: *** [Makefile:24: test] Error 10
Running after_script
Uploading artifacts for failed job
ERROR: Job failed: exit code 1