major restructuring

6 jobs for 23-define-estimator-interface in 21 minutes and 10 seconds (queued for 2 seconds)
Name Stage Failure
ctest-mlmc Test
89% tests passed, 1 tests failed out of 9

Total Test time (real) = 453.46 sec

The following tests FAILED:
6 - TestLevelMaps (Child aborted)
Errors while running CTest
Cleaning up file based variables
ERROR: Job failed: exit code 1