fix issue #843: circular imports

Avoid importing static config module in config/__init__.py, since it
is called when importing any module under bliss.config, which can
cause some circular imports
4 jobs for 843-circular-imports in 38 minutes and 51 seconds
Status Job ID Name Coverage
  Style
passed #48236
check_style

00:00:19

 
  Tests
passed #48237
run_tests:source

00:37:07

34.0%
 
  Build
passed #48238
create_doc:reference

00:01:24

passed #48239
create_doc:user

00:01:00